R.G. wrote:
I think that the subject itself needs more contrast. One aspect of that would be deeper darks which is actually reducing the contrast between the subject and the background, but stronger definition will give the subject more separation from the background. The theme is low key so a lack of bright highlights shouldn't be a problem, but there is definitely a need for stronger detail and definition. Some extra sharpening might help as well.
This pretty well sums up my views well. Very interesting image!