Pretty good, but maybe take away the lens flare or make it more subtle. IMO, the contrast is a lil too high Keep it up!
I really like the colors, the only thing I would say to do is to blend it a little more, but You really don't have to. The sig turned out really nice, also good job with the lighting.
Too contrasted and really sharp, tone down the lighting on his eye and make the horizontal lines a little less opaque.