Do you submit your walls two at a time on purpose?
Pointers:
Where the hell is he standing on?
I have also noticed that you tend to blur the edges of the characters. I don't know if it's because of bad extraction but this is a really sharp wall and having blurry edges around the character doesn't make it look good.
I've also got to say that I don't like the texturing due to the fact that it makes the wall look grainy and of bad quality.
That's the basic things I thought of, though I could come up with more if I tried.
Sorry if I look kind of mean but you've made about 96 walls and I don't see any progress whatsoever. Try editing the scans you are using in your walls.
Anna/Fire