Here's the main character for the comic I'm working on. This was my first attempt at using screen tones. I just made couple of brushes in Photosho and used them. And advice on that?
The shading on his body is pretty good, as is most of the shading on his clothing, though the diagonal silver lines look a little odd and take aways some of the feeling of depth. The background copy of the character is interesting, and I like the wood texture. The shading looks a little odd, but I'm assuming that you don't want it to look to 3d, so that isn't a problem.