Just out of boredom, I decided to try and name all of the preset avatars:
012 - Cait Sith (Anime character)
2 - Mario (SNES Mario Kart, most likely)
3 - Tails (SA2, by the looks of it)
366 - Pikachu (PokE9;mon, funnily enough)
375 - Blastoise (also a PokE9;mon)
377 - Mewtwo (Same)
4 - No idea
404 - Scyther (PokE9;mon again)
405 - Eevee (Do I need to repeat myself)
The rest already had names. And the reason I've had to edit this post is because for some reason the Enter button decided to actually post the entry instead of starting a new line for some reason.