Great Start! I like the stylized cheeks, and jaw. IMO, I think you should continue the style throughout the head. Like make the nose more angular, and the same with the brow. The lips don't match the face, again my opinion. Usually the lower lip doesn't come to a point, but rather sinks in in the middle. I would also define the upper lips just a bit more. Unless you are going for a Clint Eastwood tight lipped head. Then you'd be fine!
Keep it up.