He's got gorilla arms. You should really consider head-to-body ratio on this one too. It will make a ton of difference in how it comes across. His legs are much too short. No offense intended, but he really does have the proportions of donkey kong.
A key thing to keep in mind is that the arms, when outstretched to the side in T pose, should equal the height of the person from head to toe, from the tip of the fingers on one arm to the tip of the fingers on the other arm. Keep this in mind as you draw and pose your characters.