If I were a guy, Underdog. Who doesn't like a warm puppy? Since puppies are so cute, girls hug them and carry them around, so UD would be able to nuzzle a lot of other puppies.
But since I'm a girl, Phoenix from the X-Men, reborn from her former self, raven-haired and hot as Hell, able to influence men to do her bidding.
If I could just squeeze myself into that suit...