Having dated someone whose gender I didn't know until we ended up in bed I can safely say it doesn't make a bit of difference.
You like someone or not. You fancy someone or not.

In V's case, we have someone with an outspoken mind, someone who I know I would love to be friends with, who would drive me nuts as a lover, and who I definitely wouldn't want as an enemy.
Those feelings won't change because I suddenly know V's gender.

V is genderqueer, undefined and taht does, sort of, make V more interesting.
If gender was suddenly revealed, it woudl posisbly just be a dissapointment, beause the mystery would then be gone.

So while this discussion itself is interesting I am not sure what we are trying to establish here?