Very entertaining character..
He begs to be animated.
However, there are a few weird things happening with the upperbody. He is very muscular but you have over exagerated the lower part of his rib cage (further enhanced by the painted cast shadows). This should be covered by muscle transitioning from abdominals into the tuck under the front of the lats. Second, your biceps appear to be terminating into the middle top of the back of the forearm rather than into the inside middle of the forearm. Just a quick check of an anotomy book would show you what I mean. These things are easy to miss when modeling - you get lost in the detail and until someone points it out or you take a step back you miss it. We all do it. Also, considering the great stylization of the physique, his knees seem a little over-worked.
On a positive note - that is an absolutely great character head and face. You nailed this haughty but jovial confidense in the smile and eyes....well done.
Ssssh! listen....you smell that?