I like #4 too, kind of like #6 but not sure about the movement blur. Seem a little dark, at least how they show up on here. I don't mean dark and moody I just mean a little too dark to see well - I think maybe since the background's tan and black and he's similar colors he blends in too much. Maybe some adjustments, I like the idea of the portraits. Did he maybe get more comfortable as you went along? I might keep shooting more and go for the eyes, there's something there that seems to be starting to come thru in some of these that might have potential to be stunning.
(And yeah, I see hotness there, it doesn't exactly hurt my eyes looking at him. Shoot more!)