With the NFL, I'm the kind of fan that I would give grief to in a football context. I don't really support anyone and generally want teams who are underdogs (at least in recent years) to do well. For example, I wanted the Chiefs to win the Superbowl a few years back (sorry again Axl) but it's getting a bit tedious now. Liked the Bengals last couple of years but they're not in this time. Would love the Lions to win it but don't think they will. Otherwise, Bills, Dolphins, Browns, Texans get my vote. Don't mind Ravens either despite recentish success.
There are exceptions to this. Fuck the Cowboys and Pats.