How do you classify games as major games.
BCS games? Games on New Years and after?
You're right, there's no scientific method of classifying which games might be "major" games. But you can gather some information if you're willing to look hard enough. For instance, I'm sure you could gather from Missouri's websites, football fanblogs/forums, etc. that they were disappointed to be playing the the Alamo bowl considering their high hopes for the season, etc. While if you went to Northwestern's side, you'd see articles on the importance of this game for the football programs, what it would mean to the school in terms of credibility, how excited these players are to be in a bowl for the first time, and the like.
I would say that the major games are the ones where both teams are ranked fairly highly, excited to be there, and that it is a game with a fair amount of prestige.
For instance, I know USC and Penn State might be "disappointed" that they aren't playing for a national championship but they are still in the fucking Rose Bowl. This a game that both teams want to win badly. I don't think you'll find a motivational edge here. But tonight's game with Missouri clearly showed that the attitude a team brings to the game, especially after weeks of not playing, is a significant factor to consider in your handicapping of bowl games. Obviously motivation isn't everything -- you still need coaching, talent, execution, and some luck.
I think tomorrow night, Nevada has this motivational edge. You look at Maryland -- they beat #23 ranked (at the time) California, #20 Clemson, shut out #21 Wake Forest 26 to 0, and pulled out a tough win against#16 North Carolina. They beat 4 ranked teams, one on the road. They have to be thinking better than the Humanitarian Bowl. Then at home and senior night, they get embarrassed by Florida St. 37-3, which may have carried over to their loss to BC the last week of the season. It would be hard after such crashing disappointment for a lot of these Maryland players to get up for 3 weeks of practice to play in the Humanitarian Bowl. Most of them probably just want the season to end and move on. Instead they have to fly out to Idaho to face one of the top rushing attacks in the country.
In my estimation, motivation matters more for defense--which revolves around tackling--and I don't think Maryland's going to be inspired to fly around and stop Nevada's outstanding rushing game.
EDIT: Sorry Randizzle if it comes across as me trying to pass off my picks in your thread. I was trying to make a larger point about motivation in these bowl games and got a little carried out.