Oh, dear Lord.
That is too many avatars.
Overall, they all look very nice, though one of my gripes is the number of times a grudge-y background is used--while it works for something like evil or despair, I see it used on other avatars--such as Link or seemingly random cartoons. But you still have your variety of styles and everything looks nice.
As for the animations, the move rather fast or are seemingly random--like the one that flickers the image. I'm not the best at animations either (still learning) so do not think that my advice is the best. I spot flaws in plenty of things and point them out: that's the kind of critic I am.
Overall, keep up the good work, and I want to see those banners and wallpapers sometime soon.