I go by Pan, Panda, etc. irl and for obvious reasons, it's taken as a name on many sites. I always collect panda BEAR stuff, too, and I ran into The Oatmeal's comic about a bear and a pterodactyl mix and ended up with Pandactyle. It has Panda in it, and it gives it a cool nickname without adding 458732984572 numbers at the end. 