I'm male and it depends on the intended use of the character.
My main (KDF and Fed) - Male
Roleplaying - Male
General gameplay - Female. If I'm going to spend hours looking at something, I'd prefer that something was a pixilated representation of a woman then a pixilated representation of a man.
All my female toons are aliens made to look human (it's to do with the greater choice of traits, the same goes for my male toons), so when I'm on a social map for any lentgth of time I'll switch costumes so she becomes an ugly looking genderless monster.