NittanyNation posed the same question to everyone: How do you think -- or hope -- your class will be remembered in four or five years?
Here's what they had to say:
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But don't be fooled here. Defensive line coach Larry Johnson Sr. has played one of the most important roles in piecing together this 2013 recruiting class.
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ESPN.com caught up with O'Brien on Wednesday to discuss the class.
Dari Nowkhah interviews Penn State coach Bill O'Brien about the Nittany Lions' recruiting class, which is headlined by No. 1 quarterback Christian Hackenberg. Despite heavy NCAA sanctions, Penn State has produced a top-25 class.
Signing day has gone smoothly in Happy Valley.
Here's a recap of how the letters of intent came in and how the class came together in Penn State's Class of 2013.
Follow the live blog after the jump.
From top players to sleepers, misses and everything in-between, there's a lot going on in this class:
Who they got: Penn State looks as if it will sign 17 players this class, including the five who have already enrolled. The headliners are ESPN's No. 1 QB in Christian Hackenberg and No. 1 TE in Adam Breneman, who have helped bring the same kind of excitement to this class as Derrick Williams and Justin King in 2005. Penn State turned in a quality offensive group, with four-star prospects also at offensive guard (Brendan Mahon), offensive tackle (Andrew Nelson) and wideout (DaeSean Hamilton).
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They'll officially become part of Penn State today. So, we asked them, why did you want to commit Penn State? Here's what they had to say this week:
- QB Christian Hackenberg, Fork Union, Va./Fork Union, four stars, No. 15 in ESPN 150: "You know, I just got this gut feeling that it was home for me. Everything fell in line for me moreso than the other schools. I liked a lot of other schools, but I loved Penn State."
- OT Andrew Nelson, Hershey, Pa./Hershey, four stars:"Well, first off, I've been a Penn State fan my entire life. My dad went to Penn State, his whole family went to Penn State, my sister went to Penn State -- so I've been watching Penn State my whole life. So, since like fifth grade, I wanted to play for Penn State. It also came down to, most importantly, the education. That should be first on everyone's list, and it was on mine. Penn State offered a great education, and it offered the major I'm looking for.
- "And, secondly, it would have to be the coaching staff and how they can develop me -- not just as a player but as a man of character. I think this coaching staff will do the best job of that. And, then, location comes into it. I have to admit I'm a momma's boy, and I love being around my family. And I want them to come and watch me play. So, in a nutshell, that's why."
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The Alabama boy with the southern drawl grew up less than a three-hour drive from Tuscaloosa. Visions of the SEC once danced in his head at night and, during the day, it wouldn't be uncommon for him to step on the school bus while wearing a gray "Roll Tide" T-shirt.
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ESPN RecruitingNation has signing day covered. Follow ESPNU’s coverage, chat with analysts and get breaking news on our Signing Day Live page beginning at 7:30 a.m. ET through 7 p.m. ET. For more on what to expect on signing day, check out the Big Ten conference breakdown 
.
Bold prediction: Penn State will hang on to a top-25 class, even if just by the slimmest of margins. Bill O'Brien and his staff deserve all the credit in the world for having to originally put together a class after the scandal and then reshaping it after NCAA sanctions were levied in July.
Illinois
Biggest need: The Illini's offense was arguably the worst in the Big Ten in 2012, and Illinois needs help just about everywhere on offense, especially at the skill positions.
Biggest recruit: Four-star athlete Aaron Bailey is the future at quarterback for Illinois, and the coaches will expect him to be ready to take the reins once Nathan Scheelhaase moves on.
Indiana
Biggest need: To just put up a fence around Indianapolis and the state of Indiana. Kevin Wilson did that, assuaging defensive line concerns in the process by adding Indianapolis linemen David Kenney III and Darius Latham.
Biggest recruit: The Hoosiers are not accustomed to landing ESPN 150 prospects, but not only did they get Rashard Fant, but they got him all the way out of Georgia.
Iowa
Biggest need: After having several productive running backs over the past decade, the Hawkeyes are hurting in the backfield due to injuries and off-the-field issues.
Biggest recruit: The Hawkeyes were after Berkley Edwards for a while, but once that fell through they put the screws to former Boston College running back commit LeShun Daniels. He flipped shortly after an official visit to Iowa.
Michigan
Biggest need: Brady Hoke is transitioning to a pro-style offense, and he needed a pocket passer and a running back who makes his living in between the tackles.
Biggest recruit: ESPN 150 quarterback Shane Morris is that pro-style quarterback, but he is also the unquestioned leader of Team 134 and helped put together one of the nation’s top classes.
Michigan State
Biggest need: The Spartans will lose their top two rushers from 2012, including Big Ten rushing leader Le’Veon Bell, so running back is a priority. They are bringing in two.
Biggest recruit: ESPN 300 dual-threat quarterback Damion Terry is a capable thrower and runner, and he led his high school to a state title as a senior. Andrew Maxwell did not exactly lock down the starting quarterback job with his performance last season.
Minnesota
Biggest need: Donnell Kirkwood is a promising player at running back, but he struggled against some of the league’s better defenses and wore down late in the season. A complement is sorely needed.
Biggest recruit: Three-star running back Berkley Edwards is the younger brother of former Michigan receiver Braylon Edwards. Berkley is one of the Gophers’ highest-rated commitments, and running back is a position that lends itself to an easy transition.
Nebraska
Biggest need: Nebraska needs to return to its days of the Blackshirts, as the Huskers' defense was gashed on the ground all season. The Huskers need help along the defensive line.
Biggest recruit: Elite 11 finalist Johnny Stanton is a dual-threat quarterback, but he’s a much more polished passer than Taylor Martinez, who has taken his share of lumps since his flashy start in Lincoln.
Northwestern
Biggest need: Now that the Wildcats are a legitimate threat in the Big Ten under Pat Fitzgerald, the next step is to get better athletes to compete with Michigan and Ohio State. Fitzgerald is doing that with Ifeadi Odenigbo in 2012 and Godwin Igwebuike in 2013.
Biggest recruit: ESPN 300 dual-threat quarterback Matt Alviti had offers from some big programs including Notre Dame, but he chose nearby Northwestern. The Wildcats have an unsettled situation at quarterback, and as a local product Alviti could be called for by the fans if the quarterback play does not improve.
Ohio State
Biggest need: Linebacker was the biggest need for the Buckeyes, and after a shaky start Urban Meyer wrapped up a nice haul at the position with ESPN 150 products Trey Johnson and Mike Mitchell.
Biggest recruit: It’s a tie between Jalin Marshall and Dontre Wilson, who are separated by just a few spots in the ESPN 150. Both have game-breaking ability as a receiver or out of the backfield.
Penn State
Biggest need: Despite significantly improved play from Matt McGloin in 2012, the Nittany Lions have not been blessed with quarterbacks the past decade, with the exception of a few good seasons from Michael Robinson and Daryll Clark.
Biggest recruit: While the class did field its share of decommitments, the damage would have been irreparable if No. 1 QB Christian Hackenberg bolted. By staying on, he instilled confidence in several other recruits to stay or join him in State College.
Purdue
Biggest need: The quarterback situation at Purdue has been unsettled the past few seasons, which is not good when it comes to the most important position on the field.
Biggest recruit: An Elite 11 finalist, Danny Etling stuck with the Boilermakers through the coaching change. He will be looked at as the future of the program.
Wisconsin
Biggest need: While the Badgers always have a strong stable of backs, losing Montee Ball is going to hurt, especially in the red zone. Wisconsin addressed it with top commitment Corey Clement.
Biggest recruit: The loss of Russell Wilson left a major void at quarterback, but the Badgers landed quarterback Tanner McEvoy on Monday. McEvoy is ranked No. 44 among juco prospects nationally and the expectation is he will contend for a starting job immediately.
Video: Penn State recruiting on 'OTL'
Steve Weissman talks to Tom Luginbill and Josh Moyer on "Outside the Lines" about Penn State's strong recruiting class -- which includes No. 1 QB Christian Hackenberg -- despite its NCAA sanctions.
STATE COLLEGE, Pa. -- With signing day just a day away, all the focus will be on the four-star talent and the big-name players. But it's not always the elite recruits who contribute most.
After all, where did Penn State's current starters rank when they were recruits?
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DE Deion Barnes, Grade: 78, three stars: He clearly came in underrated. He was the nation's No. 45 defensive end and was No. 12 in the state. He now has a future playing football on Sundays, and -- if ESPN could get a mulligan here -- Barnes would easily be a top-10 four-star defensive end. He's already the top pass-rusher on the team and finished with six sacks and 10 tackles for loss last year. He was ranked behind Anthony Zettel in this class.
DT DaQuan Jones, Grade: 77, three stars: The jury's still out on Jones, but his grade doesn't seem too far off from where he'll end up. He'll be a two-year starter and he did relatively well last season. ESPN thought he could play on the offensive line, too, but believed he "should become a solid starter at the BCS level of competition."
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For the last few days, we've been taking questions from college football fans on Twitter. Hackenberg agreed to answer them, so we chose 10 of the best questions and posed them to him Monday night.
Here's what the No. 15 high school senior in the country -- and No. 1 quarterback -- had to say:
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ABOUT NITTANY NATION
Josh Moyer
Josh Moyer joined ESPN.com in 2012 after covering Penn State football for recruiting website Nittany Network and City Hall for The Citizens' Voice in Wilkes-Barre, Pa. Moyer graduated from Penn State and earned his graduate degree at Columbia. Email him at espnjoshmoyer@gmail.com.