hey it's the dude in your sig, whaddya know. It's accurate, that's about it. Try some shading to make it look a little more realistic.
the chest plate seems a bit too big. (if you drew it with a pencil and paper how did you scan it so well every time i do it the pic comes out weird)
Pretty damn good. Seems to be pretty much spot on. You could always scan it in, lineart it or photoshop it. Oh, and your sig actually kicks enourmous ass.
The shading is in there, but it's just hard to see (and sometimes non-existant) because of my scanner. If I darken the actual drawing anymore, everything would seem too dark.
Very nice my only suggestion would be, since its kind of too late, I think that the chest is way..way too big. I think you did well on this though. Nice job