EXCELLENT!Very nice shot!!!!! i dont think that i can tell you how to make this shot any better as its already perfect! and i love how well you kept the backround out of focus and your subject in focus :-)
LOL I think I would rename this one the "Headbangers Ball!" Punk hair cut, tattos, and headbangin'! All that is missing is the piercings! Looks like you could have used a little stronger fill flash to highlight the eyes. Little soft in focus, looks as if your camera was reading the neck of the animal rather than the eye. Keep 'em coming!
Wonderful image, humm...constructive comments...I think I would try to clone out the area under his nose with the green background. Nose and mouth is slightly out of focus? Still a nice image!