Perfectionist: I wont exactly 'tear it to pieces' but ill give you my view on your banner. I think that render is REALLY bad to work with, considering it has two light sources, if you look in the left arm and the right, so its a bit confusing. Your light source didnt fit in really well, considering the light is most bright as his head, youve put it a bit too far away from there. Also, considering its dark on the left side, instead of putting all those colours there, it should probably be blackish. Cause right now, the right side, where the light is coming from is the darkest part of the banner. Ive seen you've tried to use some simple text, but it doesnt look good ;s. Its vertical, which makes it look dodgy, unless the letters are put the right way up going down, if you get what i mean. I think the text would look better as a white watermark sought of thing in the bottom right corner. WITH the border cutting it off just a bit ;].
I see what your trying to do, and its a good-ish idea :P.