I've been reading slash before I started roleplaying (so it's been a long time) and I usually play males, so I find myself trying to make my character gay or bisexual most of the time, unless it's unrealistic for the character to be so or I feel the game already has enough gay characters. I do roleplay het, but honestly, I'd rather make my character asexual than hetereosexual. I've considered making female characters bi or lesbian before, but...when I think of writing the sex scenes in the case they come up...it makes me not want to.