Zero is the Sniping "expert"
I'd assume Maya will be SMG's
Axton Combat Rifles
Salvador anything, but he can dual wield rocket launchers!
About the same sex thing, not sure how that matters much, I know when I'm playing I'm only watching where my team mates are, i don't care if they have boobs or not.
That's just me though. :)
Did the guy who can't play a girl in an rpg, never enjoy the Amazon, Sorc or Assassin in diablo 2?