I'm male, and I generally play male. Strangely enough, this topic came up in context of one of our gamers playing his first female character, and another mentioning that I never play female characters. It was strange to hear that, because as someone who likes to DM, and that includes playing suplemental DM PCs to help small parties, I frequently play female chracters.I think there is something to length of the campaign and the degree of identification. If I'm going to be solely identifying with a character in an extended campaign, I think it would be difficult not to play a male, but if it's short term or I am role-playing more than one character, it's much easier.