I by no means am a football fan, watch games every now and then (more so if I'm betting on games)
However guys like Tom Brady are reasons why I end up liking the teams, elite players make you fans. Also love Manning, loved the Colts, however since Manning went over to the Broncos, I've liked the Broncos more.
Bandwagoner? ehhh, just a fan of some players, so the team obviously comes with. If someone asked me what team I like, I'd also mention that I hardly watch football at all. 4th Quarter and a close game and I'll tune it, that's about it, slowly getting more into the sport though.
Broncos I can name you one player, Patriots 4. But I'll slowly be learning!
I like the Saints too:P