I switch back and forth between Prince Jr and Lunatik. Prince is pretty cool and Lunatik is fairly cute, and both have fairly decent art.
I do wish some of the newer cards would be added. I'd kill an ant for pics of Clover, Otto, Zinfrid and Kawamashi Cr.
Mine is a rather hard to make out shot of a detail from Rodin's Gates of Hell.
Ohh. Menu picture, not avatar picture. Sorry. Haha.
I liked the idea that you could unlock them via missions. But let's be honest it's not exactly important. No one other than you sees it haha