Huh. I've never really bothered trying to represent what I'm interested in with mine. My avatar has kind've created its own character, which used to be based off of mine, but she's more of become a person who may identify herself with me, but she's just an identity that I would rather be. Thee has become basically her own person over the years, in my mind. Normally, she looks more like this:
Or of similar badass nature. Or sometimes she'll dress up, or sometimes she'll look rather laid back, and maybe a little more artistic, and she's notable for dressing up for holidays. Mine's lost its sense of "it's just an avatar" and instead of becoming an online me, she's become her own. Like she's grown up, you know?