I get a very Ernest Hemingway vibe, but unfortunately NOT a 'power portrait' vibe. His eyes are mostly closed, and his posed seems somewhat slumped. Normally when we say 'Power portrait' we're talking about CEOs, political leaders, etc who are projecting strength and power. I get that you've shot this from a low angle, but that really isn't all there is to it. That said I rather like the image on its own merits.