I hardly note avatars and never really considered adding one!
I guess that's weird. I'm glad to know that!
The funny thing is, I think of myself as a fairly visual person--- I "organize" my desk by leaving everything out where I can see it! But I'm WAY more of a verbal, word loving sort and so that must be where my eyes rest.
So can any picture in my iPhoto become an avatar? I could probably find one of our cat or my garden.