Over-contrasted in places (his left shoulder, for example, and his visor), and text really needs work. Composition needs work, as the render placement isn't quite correct, but I like the effects, and the lighting ain't half bad.
ya i noticed the contrasting issue, as far as the render placement goes i usually don't like it centered instead a little to one side but with the position of the render I took i didn't want it hugging a wall.