Hmm. I was shading as if the lightsource was coming from somewhere in front and to the left of him.
Also, I used a black outline on what I wanted to stick out more. I used it on the beard to try and get some relief. I used it on the pants to try and make them seem thick, heavy. And on the skin, I wanted it to seem a bit softer, if thats the right word, than the rest. I had my reasons, and I was also just messing around with techniques, if you could call the that, in my head.
However, just for you, ill make an edit according to your suggestions.