It's good. You might try to increase the body mass. He looks a little too thin.
Everything else looks good. Good originality from the tutorial.
The mean look is kinda cool and add eyes-- you'll be surprized how life-like it'll become.
"The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man."
George Bernard Shaw - Man and Superman