Either
Team Aqua or
Team Rocket, both are pretty awesome! :D
Or I'd join both...
Team Magma didn't really stand out for me... They seemes so...boring...(hides from the fanboys and girls...) Meh, I guess I never liked Groudon, or Maxie...
Team Galactic? Well, for starters they look childish. They have bowl haircuts which make them look so :\ The
only good things about them are Cyrus is pretty cool and they go after Dialga in Diamond. Those are pretty much the only reasons I don't entirely hate them.
Team Rocket is just plain cool. Giovanni's pretty epic
Their outfit is prettu good, too! The only thing I dislike about them is in the naime, it makes them seem like a bunch of idiots (James, Jessie, Meowth Hutch[/S] Butch;) and Cassidy anyone?)
Team Aqua chase after one of my favourite legendaries and match their theme pretty well. (Magma look like....gangsters...) Also, I like pirates so...;)
Also, Archie makes a pretty good leader. :D