It's a good expression, but there are some issues; most notably the unusual shadow pattern on his face. his left cheek is very hot, verging on blown, while his right is much darker. As well, the image desparately needs to be leveled.
I would avoid crops such as the that on his left elbow. If you need to crop a limb, do it boldly and never at/near a joint. Try fof a more homegenous background as well; the pattern of lights and darks here is rather distracting.
Just my $00.02 worth - your mileage may vary.
~John