A good portrait but there's too little noise. It needs some texture.
Back for a second look. Bumping it up a point or two. It's starting to click with me. I was initially troubled by the too smooth looking skin and hair -- like maybe you applied too much noise reduction. But I'm not sure that's what's going on now. What I find most effective is his placement in the frame against that plain blurred background.
It looks like you've smoothed his skin, I have to say I would have preferred seeing this in a grunge look, even your model's shirt looks grungy. But then again thats just me :D