Love the movement, posture, and angle. I meant to comment on this, but perhaps it is just as well I didn't. I would have brought your commenter average down -- I only gave you a 9.
This slightly blurred, grainy portrait is quite moving. Emotions both bubble over and simmer within. I don' know what his actual emotions are, but most prominent to my eye, due to visage and mien, is that of deep concern. The disposition of tones is wonderful. That he's about to exit the frame conveys a sense of urgency and diffidence. The beautifully picked out sliding lock above his left hand further suggests an atmosphere of being closed off. It's kabuki. The upper right corner is somewhat distracting, but so it goes.
Personal favorite of the challenge.
To me, a portrait means that a person knows he/she is modeling/sitting for you. So, I'm not sure this works in my definition. I hope others have a different one. :D