Honest question, why is college football such a big thing? Isn't it like what the U21s are to the senior teams in real football?
Ummm... No. These football teams are the identities of states, or of deeply knit social groups (think Notre Dame for urban Catholics or the military academies). Most states will have two major teams with a derby relationship (Florida/Florida State, Auburn/Alabama, Texas/Texas A&M).
Sometimes it crosses borders (Florida/Georgia, Michigan/Ohio State, Texas/Oklahoma) In much of the country, it is far bigger than professional football, especially true back when many parts of the country weren't anywhere near an NFL team. The college rivalries go back 100 years or more in many cases. The expansion of the NFL to more cities and regions has lessened this a bit, but it is still true in the South.
College ball still rules. People go to the game like people go to church, if people went to church drunk, that is. We have eight college stadiums that seat over 100,000 people. The pregame is about as important as the game, as a social hour.
Texas seats 100,000 - Texas A&M seats 102,000. You have to live it to understand it. Home games are a big deal, because you will only get six a year maximum, and it only happens from September to December. That's the season. It used to all get settled on New Year's Day.
You've got to live it to understand. Come back later and ask us about March Madness. That's amazingly boss.