There's actually quite an appeal to roleplaying as an opposite-gendered character. In fact, the very first time I played a forum game, it was a roleplay called "The Inn" which had that as a prerequisite: being the opposite gender, talking to others in an inn.
(Interestingly enough, the girls playing guys all made their guys look buff and such, whereas the guys playing girls just had them be girls, not putting any great detail into their appearances beyond the basics of height and hair/eye color/length. :P)
I usually only play as an opposite-gendered character whenever I get to play two characters at the same time. The first pair of characters were childhood friends. The second pair were fraternal twins, the brother being a monk and the sister being a wizard. According to the GM, we really needed a wizard. Anyways, I had the brother be overprotective of the sister since she was the squishy magic-user. As a result, I accidentally gave the brother siscon vibes. >_>
I've been subject to some ribbing in the evil pony campaign I play in for my shapeshifter's tendency to favor female forms. In my defense, his form assortment is roughly proportional to what we see of Equestrian's population... And I make female characters all the time, though I don't always end up playing them.
(Interestingly enough, the girls playing guys all made their guys look buff and such, whereas the guys playing girls just had them be girls, not putting any great detail into their appearances beyond the basics of height and hair/eye color/length. :P)
Oh right. Lelouch and his overprotective/siscon vibes.