I think a tighter crop would have made this a lot better with having a lot less forehead in it, thus placing the eye less dead-center.
Overall could use a white balance adjustment to render more realistic skin tones.
Gives me an odd uneasy feeling. maybe just becasue it makes me feel so close to the models face like i'm in his "personal space" lol. nice composition.
This is goping to sound brutal, but please take this in the way it isntended, as an honest critique.
The lighting is really not helping here, its flat and provides no definition. The eye is bang central, both vertically and horizontally, it may have been better to have it higher or lower, just to break up the composition. Also the eye looking away reduces the impact.
All in all a fairly non-descript image which with some thought could have been much much better.