Ehhh, I like a lot of teams.
MLS, Galaxy; blame Beckham for getting me into them a while back and never really got out. Ran out of time to follow them though.
Clubwise, I love Barcelona because they're such a joy to watch. Between their very talented strikers and frontline, their strong midfield, and their attacking triangles to shift the point of attack [which I absolutely love], they're taking home a lot of trophies. Maybe that makes me a fairweather fan, but really, I just love watching good soccer.
International, I support the USA, obviously, but mostly European teams. England, Germany, and Spain, to be exact. If I had to pick one, it would be England though.