im not too keen on the pen tooling around his arm, i dont think it fits well, text is brilliant thats what catches alot of people out, i didnt actually see it at first, i agree with keva, it lacks something but im not too sure what exactly and i would remove the remains of a c4d from his face, its distracting.. Good tag though well done. oooh i just thought about that it may be lacking, try darkening the bg slightly and adding a bit more contrast to him if you get what i mean
You should sharpen the focal a bit, blur the rest and put in a decent lightsource, that'll probably make it look a lot better. Other than that, you could try to make the pen tool swirl around his arm white, and give it an outer glow. The text isn't really good either, fonts other than the standard ones (arial, times new roman) never work for me. Also, try placing the text somewhere else... Like on his shoulder, horizontally, and try arial or lucida sans unicode.