The hair rendering is awesome and I like how confident your lines are. I think his upper face is generally ok except the right eye is too close to the nose. Generally you can draw a straight line down from the inner eye to the outer edge of the nose wing. I don't know if it's because the eyes are too close or the nose is too wide, or a little bit of both. His lower face is much too short. It looks like his entire jaw bone is missing. The chin seems long enough, but the jaw bone from the corner of the jaw to the chin is too thin.