The cigarette isn't lighting the guy's face, the smoke is a bit too opaque, fingerposing is odd, and it doesn't look like you rendered sdof, and the blood on his cheek looks superfluous.
All that being said, there's something that I really like about this. Not really sure what, though.
cigarettes aren't really great sources of light
Yea.
It's too bright, even. Unless he's chiefing down on that thing, it wouldn't be lit up like that.
I do agree with the other points about the dof, blood and smoke. Also I feel like the left arm is too idle.