My husband envisions my totem as a cat. I think it's more likely an owl. (I just have the frog up 'cause I think it's cute.) I really don't know, though. I've never done any sort of quest or exploration for it.
Some people put images of the characters they role-play, which also seems an aspect of self, or an anti-aspect.
The whole thing is interesting to think about. The need for people to represent themselves in this way, with avatars and symbols. It's always been present in human culture. Is it a way to represent our inner selves because our exteriors seem to rarely match our interiors?