Male.
It is funny though that some people think the avatar is you. I've gotten this before on forums where people were older or varied in age. When I send my friend who's 41 links to funny stuff in certain forums, he'll say "That girl was funny when she said...". Then go on to say "...well, at least I think it was a girl, there was a picture of a girl on the side". I'm like, "No, pretty sure that's a guy" He doesn't really use forums too much or pay attention to stuff like that.
By the way, what are the size restrictions on avatars here? Most have 80 x 80, but I see a few a little larger.