Digital Art Avatars/Icons PLEASE CRITIQUE!!!

I'm completely new to the area of photoshop. Mostly I've just been tinkering with it. So, here's the outcome of some early practice. My coloring skills are mediocre at best, so ignore them if you have to.

And yes, there are several different sizes going on here. Total accident on my part. Oops!

Please, critiqueing is my only way to get better! Please help me out here!

Ichigo Kurosaki/Bleach. This is my latest creation and newest avatar (for myself, that is).


Shinji Hirako/Bleach. Bleach is my love obsession right now. I'm suprised I haven't made more avys yet...
I tried to fix the size on this one, but it would NOT agree with me. Sorry its so grainy!
My second to latest creation. Not my best obviously, and its my first photoshop piece.
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These from here on were made with Jasc Paint Pro.

Some Roxas/Ven stuff. Pretty blurry in spots... But the first one's the best in my opinion.


Sora/Roxas.


Terra. I really wanted to do an icon for him but I couldn't find a scan that I really liked. I ended up with this one, and a good friend of mine used it, so it's probably not THAT bad...right? lol.


And finally some Versus XIII stuff. I actually made a wallpaper outta the first one's original picture.
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Again, I appreciate any advice, tips, etc. you can give me. Thanks!

 

They're not bad, but if you're making Avatars, try not to exceed 110x110. Try to use more high quality stocks as well.

They're nice. =D