I tend to have a bit of fun with my avatar after I've been on a forum more that just briefly. Hopefully folks will either laugh at me or with me. I don't take myself seriously.
This is my current Xmas avatar.
My regular Ubuntu avatar, with a ring donut in the middle being eaten by Pacman, was merely prompted by the general 'Coffee Cup' idea on the forums. Ironiclly, I've given up coffee, as it's been cited as a possible cause of tinnitus. Of wich I have a severe case.
I no longer have my original images for these avatars, due to various computer crashes, mostly caused my myself.