I should probably update mine, so here we go, with a little more detail:
NFL: Panthers first and foremost, but the Ravens second. My parents are from Baltimore, which is why I follow both of the Baltimore teams. Of course, I'm from Charlotte, so Long Live the Queen City!
NBA: Hornets, even if they make me not want to watch basketball. We do have some exciting young players, so maybe there's some hope. MJ can go shove it, though.
MLB: Orioles because of my dad, but if (when?) Charlotte gets a team, I'll switch allegiances, even though the O's would be number two.
NHL: Since Charlotte and Baltimore don't have teams, I kinda just follow it as a whole. I will never support Raleigh in any facet so the Hurricanes are out (except for the Whalers, if they came back I'd root for them), I followed both Nashville and Vegas for a bit but I just enjoy hockey in general.
MLS: Charlotte, starting next year. For now, anyone but Atlanta.
NPB: The Fighters, but I also like the Carp because they look beautiful in those red jerseys.
J.League: Cerezo Osaka. Pink is beautiful, and they use lots of it.
NCAA - Maryland, because of my dad.
MiLB: The Knights and Tourists. BB&T Ballpark in Charlotte is beautiful, by the way, and if you get a chance to visit the city, make sure to catch a night game at the park.
AHL: The Checkers, naturally. Calder Cup champions, baby!