I can see right up both nostrils....I don't think it works as a portrait shot the angle is all wrong for my own personal tastes.
It looks... uncomfortable. I'm not sure I can give the reason. His right arm cut off. Maybe the strap falling down. He seems in the middle of something. Unfinished
Remember my post of the girl singer Zooey, well he was stood behind me and was singing along the girl offered him the microphone I wondered what was happening spun around and grabbed this shot,as they say every picture tells a story.