If you plan to use this model, will he be naked, like in the pictures, or are you practicing? Or are you just screwing around totaly for the hell of it?
He's pretty muscular too
. If thats a tutorial you're following, I'd spring for XSI and start it right now!
On the note of constructive feedback: He already looks pretty damn good to begin with, so I can understand you, srry. I suppose his ribs make him look a bit gaunt compared to his head and upper torso. Perhaps a pic of the hands? Unless they're not made yet.
My only other concern is the slope from the shoulder to the neck. The tendon in his back is definitely a necessity, but perhaps not that steeply transitioning.
Lookin great, can't wait to see the rest!