While I don't care at all about football, nor do I understand I'll say "Go Redskins, Panthers, and Seahawks!"
Redskins because my dad's a major fan, I like Joe Gibbs, and considering the team's in my birth-city...yeah. Panthers because apparently I'm supposed to root for the team near me. Seahawks because they've been the underdog, Seattle is awesome, and my best friend's family are major fans. I'd also root for the Rams, my "mom's team," but they're not doing very well from the stats, so...meh.
I've been "raised" to hate the Cowboys. Even though I know almost nothing about them, they've seemed like poor winners. Their attitudes and cheerleaders really bug me for some reason, from what I've seen and heard. A lot of teams probably fit that, though. Or maybe just individuals. *Shrugs*
Um, yeah, anyway, I really don't care about football. The only time I've ever really paid any attention to it was during the Superbowl, and only during the commercials. I have an extremely short attention span when I see football on. It's even worse when I'm forced to go to any of my brother's games, since I can't leave and go do something else. XD