Believable3D: Those head shots look fantastic. One little thing I've noticed though is that in the side view the angle of the forehead is too steep for a male. It should angle backwards towards the top of the head. Another thing that seems a little odd, although not particularly gender-specific, is the almost straight line from the lower lip to the chin. I think there should be at least a little bit of an indentation there.

-- I'm not mad at you, just Westphalian.