Well, you could work on both, head and feet. That would certainly make this a finer piece.

Someone else mentioned the small head. It was originally too large and wide.

I think one of the things I really ought to have revised was the feet. Didn't put any detail into them. And they're a bit too large.

 I think the head is good small, to enhance the perspective effect. It's okay to cheat perspective now again, right? 

Good job! I like the style and the perspective very much. But, is it just me, or is the head a bit small for his body?

Not entirely black. I wanted the light to show up.

Good job on the perspective,those legs bug me a little...otherwise great piece you could refine it more put some AA,shape up more some things and redo the shading on that metal end and kama...kudos. 

Edit:You could do something with the background make it action like.

Great perspective, great colors. I'm not sure what the black is there for kinda plain.