Mine attempts to express gender, passive wisdom, interest in the Dwemer from the Elder Scrolls, and calmness. I'm not sure if it succeeds in any of that.
My current avatar says that I have an... odd sense of humour about this holiday that just passed. It's supposed to be mildly sarcastic, but I don't think that most people get it.
http://i3.photobucket.com/albums/y76/Caultus/featberandmonoc.jpg....... I really don't know what it could say about me. Any ideas?