Nice work, but there are still couple issues:
His head really seems too large, like as large as his shoulders...
It's a bit pillowshaded: the shadow on his face tells the light come from left, while the shade on his sleeve is coming from top-right.
There is missing shadow on his t-shirt under his arm. The light is coming from left et his body is facing right, so all is t-shirt should be shaded. Same goes for the right part of the (blue) vest. I would say that it should be shaded from about under his right eye (our left eye OPV) until the t-shirt.