I like a lot of the avatars here including some of the animals, but I think my fav was Marmie's last one with the girl looking at you and twirling her hair. It made her posts almost more like talking to someone in person. Whenever I read her posts, I imagined that girl standing there, twirling her hair and saying whatever the post said, with that look on her face.
stigmata's has never stopped bothering me. It's impressive really.
I've come to the conclusion that despite how much I personally despite it at this point, I just can't bring myself to change it for any extended period of time. It's just become too much of an integral part of my persona. Thor had his hammer, samson had his hair, shaggy had scooby, and I have this avatar.