6 - Good potential. Criticism; perhaps a slightly tighter crop on the right, 640 (in this case width, but possibly more height too, not sure) and sharper (although this is obviously opportune), make this even better in my opinion. Like the 'lines'/shapes.
Cute.. he looks like he's about to fall backward. :) My only suggestion here would be that there's so much going on that he doesn't really grab attention as the main focus.