I prefer female, but I guess that's because I prefer about any kind of magic caster/ranger/stealthy character over the normal warrior.
When I go trough games again and pick the warrior I usually go for a male character too.
But it also depends on what the differences between male and female are.
If the males are stronger and less agile then females I'd prefer a female warrior again.
And if there are other races involved, it changes my opinion too as I don't like female orcs or dwarves, but love female elves.
