Technical: Focus and depth of field are good. Color, saturation and hue: Either lighting or processing has left a little bit of a green cast to the image. Notice the color of the beard, and the middle area of the forehead as examples.
Reaction: Overall I like the picture. However, I think I would have liked it a bit better with the lighting more to the side, so as to leave the subject's left eye in shadow, and made a sharper distinction between the light and dark areas. I tend to think the processing made some of the tones go green. I would have liked the photo better, had this not happened. This is an advanced editing challenge, so the extra time processing would have helped here.
I like this image alot. The only gripe I have is the slightly hidden eye on the right. I would have just liked to have it all in the shadow on the right. Just my personal tastes but I still gave it a 9. Good luck.