Digital Art I see you there,

is it illegal for me to want all of these at the same time. These are absolutely great.

I love how you did the shading and the brightness on some of them. And the sig is just great in my opinion. It almost looks like he's popping out of some kind of fire cracker or something(wait what?...yeah I can't think of any other way to say it)

 

The Link avi has to be my favourite. The glow in the middle of Link just makes it perfect.
All of them are pretty soft looking, I think you should try making a couple avatars which are harder (if you get what i mean), maybe sharpen the focal and blur the background, something like that. They might come out looking nice O.O