I can make arguments for several.
Baylor: absolute worst experience I've had at a college football game. Their fans are arrogant ******, not so much about football, but because they're wealthy trust fund babies. The 100 fans or so I saw tailgating that is. Just a miserable time all around. People weren't very hospitable at all, which is 100% opposite from how I've been treated in College Station or Austin. ISU may suck at football, but at least we know how to have a good time.
A&M: Aggies fans are incredibly friendly, and College Station was a lot of fun. The way they've been clamoring for the SEC is A) annoying as hell, and makes me think that a good percentage of them are complete imbeciles.
OU: Bob Stoops. Enough said.