I voted spectator, because, unliked when on Alien team or on Human team, I never die ! buhahahahahaahahahahahahahahahhahahahahahha.
Oh, and I can enter inside your body and see your eyeballs.
Other than that though, its usually...
NOD, Nazis, Interpol, MECs, or GRU.
But if I cant make it to them, them I go for Humans.
You simply cant beat teh painsaw and shotgun.