I prefer imperfect characters. Someone who becomes a hero through struggles, perhaps even against their wishes, is more interesting to me than a storybook hero who just steps on to the scene and starts kicking ass. Whether this is due to 25 years of playing jRPGs, I don't know.
As for type, I prefer variety. Macho and stacked are alright in moderation, but if 50%+ of the line is like that, it gets monotonous. Not that I feel that way about Wyrd, as their line is incredibly varied due to the sheer number of robot/cyborg/monster/ghost/zombie/demon/pirate* models, but yes, it really shows in the male/female paired models.
* If you type the words ghost, zombie, and demon in that order, you are required to add "pirate".