Thank you Mike and Terley for your advices, I'll take them in consideration.
For the contrast, his clothes will probably be more detailed and contrasted, but i want to finish the animation first.
For the head, I'd want for exemple to animate completely his hair, but i'm not sure how to do it... anyone can give me some advices?
About the weight distribution, i'll take a good look at a book I recently bought (The Animator's Survival Kit by Richard Williams), i bet i'll find some good trick to improve it.

Oh and Gil, i'm sorry but i didn't copied your art, my sprite is based on a old one I did months and months ago. I totally agree that they look pretty much the same, but that's a coninsidence.

So.. next time, if you have a problem could you send a private message to the person? I'm not mad, but it's kind of anoying to see unfounded accusation in my topic.
