I chose the bunny because i wanted a picture to go with my ranking and there is a "Bunneh Club" which i thought sounded interesting, and as of yet i had not been in any clubs.
It would have to be implemented the same way the armatar contests were, and if everyone is going to make their own armatar it would take forever to screen all those submissions
I think there will also be restrictions on who can submit an armatar, which will reduce the submissions to be screened. Anyway, I normally use the light green dragon armatar because I think it is cool. I currently have the bunny armatar because I am stalking Alextigerspice.