The SEC, mostly because of Kentucky and it's fanbase. Also the yearly oh that's a good bubble win for the 4-5 SEC teams who beat nobody in the non-conference, yet get credit for a good win when Tennessee beats Alabama for example....someone has to win those games and it doesn't mean that they are any good. Also the belief that the SEC is untouchable in football gets old quickly too.
Runner up goes to the ACC because of the hype that Vitale has talked about for years and years.
Semi-related a school like Syracuse who never feels the need to leave the state until January gets a special kind of hatred too.