For me, the triangle (which is wonderful) takes on a spiritual component. By cropping as you did, you removed the mundane from the making this man appear to be at peace and in a meditative state. I like it a lot!!
One can only wonder what he is thinking about so intently. The triangle he completes suggests to me he is at a standstill with whatever he is doing, contemplating what he has just done and what he will do next. Beautiful light, and portrait!
He completes a perfect triangle. Your image would make a beautiful pairing with my own photograph of this man athttp://www.pbase.com/pnd1/image/91822286 -- I begin the story by showing him in his environment and capturing his quizzical look, and your image completes the story by moving in, abstracting him and expressing his disinterest and absorption in self.