I really like this. The attitude on the standing guy's face is somehow both threatening and tolerant at the same time. And the other face is perfect for the composition. ..pulls the attention in from the right and hands it off to the arm of the standing guy.
I think you should consider blowing this one up and framing it. It might need some contrast tweaking for a larger size. If you have done this a lot just ignore me. If not, try it. I think this is worth large print and frame.
Sorry for the multiple reply, but if you blow it up, you might want to take out that highlight on the nose of the face in the front. I think it would look better without it.