You need fingers and to attach the ears to the head. The eye size is off. The colors don't match on his shirt and pants. There is no L on his hands, the teeth need more detail. You are probably using too many polys in certain areas, and his side burns are off, indent the chin in the back more to angle. There are all slight, except for the hands. Are you using NURBs or Polygons? Use a lambert instead of a blinn.