hmmm - it looks ok, but there are some real problems with the head - for a start, it looks far too narrow, especially at the temples where is almost looks like it gets narrower behind the eyes.
also, the profile view looks kind of odd too. I think you really need to look at some reference photos to really see the shape of the skull. at the moment your model doesn't look like he has a skull. :p the back of the head is a lot more rounded at the top of the neck, behind the ear.
also there is a real disconnect between the head and the body - the head looks like it's too far forward and the join between the head and neck is too sharp - it should be much more gradual.
last, you should really keep your images size to 640 x 480, especially when so much of the image is empty space.
hope this helps.