I've been to the following:
Ohio Stadium (horseshoe): I never missed a game in my 5 seasons as a student (I went 1 extra quarter just so I could get student season tix one more year, and witness Coach Tressel's first season), plus have gone to games there from the age of 6 (my first game the Buckeyes upset #1 Iowa 22-13, when Iowa was lead by Chuck Long): I love the Shoe, 104,000+ rabid Buckeye fans clad in Scarlet & Gray, and great tailgating for miles. Usually another 50,000 fans just outside the stadium tailgating all game long, w/ big screens out everywhere. I'm biased but it's the best atmosphere out there.
Beaver Stadium: PSU: Loud, & intimidating w/ the Whiteout, but very unkind to visitors, it's the only place i've been pelted w/ beer bottles whilst wearing my school colors w/ pride.
Michigan Stadium: UM: very quiet and very unintimidating, for 110,000+ people. Very much a wine and cheese crowd.
Ross Ade Stadium: Pur: not much to it, attended the OSU game in 2002, & there were as many Buckeye fans as Pur fans it seemed like. Hard to get into and out of.
Camp Randall Stadium: Wis: First off, Madison is a great town, awesome atmosphere, closest Big Ten atmosphere to OSU on gameday. Stadium is nice, but not very big, only seats 80,000.
Ryan Field: NW: Northwestern has a nice setting in the northern Chi suburb of Evanston, right on the lake. When OSU plays there, fans are usually split close to 50/50. No midwest city comes close to Chicago in terms of stuff to do, so tailgating isn't the best but the windy city has plenty of great options to have fun pre and post game.
Memorial Field: IU: Bloomington is a great college town, the stadium isn't much at al though.
Memorial Stadium: Illinois: In the middle of a cow pasture it seems, stadium was old and worn down, not very intimidating either, of course Illinois was no good then. Tailgating was nothing special.
Notre Dame Stadium: Of course the tradition there is 2nd to none, the fans were generally great to visiting fans, the stadium only sat 60,000 when I went there to the OSU game in 1996, but it was still great. Tailgating seemed a little lackluster, b/c it was much more subdued than the rock and roll party atmosphere of OSU and some other places.
Mountaineer Field: WVU: nothing great, decent tailgating, but the fans are not the most civilized.
Lane Stadium: VT: Impressive noise level for only having 65,000 seats, has a great intimidating atmosphere, especially for night games. Pretty hard to get into Blacksburg though.
Carter Finley Stadium: NCSU: went in 2004, pregame and post game was ok, game atmosphere was ok, nothing to write home about though. Easy to get in and out of though compared to other places I've been.
Memorial Stadium: Clemson: I think it's by far the best stadium in the Carolinas, and Clemson since I've moved here has become my 2nd favorite team. Beautiful setting, the entrance is unique, great tailgating atmosphere, very hard to get to though.
Williams Brice Stadium: SC: Not to bad, about the same size of Clemson, not as intimidating though, decent but not great pre & post game tailgating atmosphere, pretty cheap tickets though.
Neyland Stadium: Ten: My favorite stadium outside of Ohio Stadium. The tailgating is unreal, the Volunteer Navy rocks, is the only stadium I've been to that seems louder than Ohio Stadium, not as nice architecturaly though.
Royal Memorial Stadium: Tex: Awesome pre and post game atmosphere, very welcoming to visiting fans, (I was even more embarrased how some Buckeye fans treated Tex fans the year before in Columbus, after the hospitalilty shown to us by Tex fans), surprisingly not a very loud stadium for it's size.
Husky Stadium: Washington: This may have the most beautiful setting of any stadium in the country, right on a cove on Lake Washington. UW's campus is awesome too. Pregame and post game atmosphere is pretty good
Sun Devil Stadium: Ariz St: While it was 2 Fiesta Bowls, the 2003 NC game where OSU beat Miami, and the 2006 game where OSU beat ND, I didn't think too much of the stadium. It got loud, but not intimidatingly loud, it wasn't the best looking stadium of all, and being a bowl game, the pregame and post game atmosphere was great. ASU does have som very good looking co-eds though, so, if you go to a game, you always have that to look forward to
Rubber Bowl: Akron: pretty crappy if you ask me
Stambaugh Stadium: Youngstown State: not bad for a Div 1AA stadium, crowd was into the game pretty good, decent tailgating.
Nippert Stadium: Cincinnati: nothing good to say about this place imo.
Pedan(sp?) Stadium: Ohio U: no one pays attn to the game, b/c everyon has partied too hard b4 hand, and is resting to party up after the game.
Some high schools, (in Ohio) have better stadiums than the above college stadiums I have been to at the smaller Ohio schools. Fawcet Stadium in Canton, home of the Canton McKinley High School, and host of the Pro Football HOF game and induction ceremony holds more people and is better than those ones. Same w/ Paul Brown Stadium, home of the Massillon High School, and host of the Ohio High School State Title games.
Stadiums I'd still like to attend:
Spartan Field: Michigan State
Kinnick Stadium: Iowa
TCB Bank Stadium: Minnesota (when it's finished, it will be a gorgeous facility, and could help bring Minnesota back to respectibility)
Ben Hill Griffin Stadium: Florida
Sanford Stadium: Georgia
Death Valley: LSU
Bryant Denny Stadium: Alabama
Mississippi's Stadium (don't know the name, but I want to go check out The Grove more than the stadium)
Memorial Stadium: Nebraska: I heard they are the nicest fans in college football
Kyle Field: Texas A & M
Autzen Stadium: Oregon
Aloha Stadium: Hawaii (though I hear their fans are complete *******s to visiting fans)
Mitchie Stadium: Army (that's what college football is all about)
If someone gives me a good reason to check out another stadium, I very well may put it on that 2nd list. I love going to different places for games.