erm... yep, that looks good, but i don't know what's exactly what you wanted to get, i don't know much about graphics and all but what i've been doing myself... head and hair look very nice, but his clothes... you could add a bit more contrast to show some volume, like on his face.
nice, you seem to have shading down, try layering colors more >>> if you do the back of the color first and then the neck it'll give it a little more dimention.