Thor signature.

http://img245.imageshack.us/img245/5459/thorl.jpg

I think that's my best sig, C&C and tips for making it better.

Well your getting better. But there is so much empty space that isnt needed try cropping it and maybe moving the focal a bit more to the middle.

Render isn't placed very well, try moving it more to the left. Looking abit washed aswell