as I posted earlier, I'm very simple
The reasons I pick genders is due to an advantage, or due to animations.
in WoW, I pick female undeads, female orcs, female trolls, and female dwarves for animations only. Everything else is male. (I only play dwarves and undeads out of what I listed of the females, though) I pick these characters/genders because of their animations and how the armor looks.
but in say, tribes? Females have a smaller hitbox. So I pick them.