I always change my avatar... The last one I remember was a walking mummy. It was a sprite from the Metal Slug series. I used them in my sig too. Hehe
Edit:
I was looking for GIFs to find that mummy I was talking about when I found Ulead GIF animator. It's the first GIF animator I have used and I just made (edited) these as a testers:
And now I'm thinking of what to do to the mummy... or whether I should just leave it as it is or not.