The paint apps on the face really pop, so much so that the hair paint seems flat and dull by comparison. The texture on the beard is well done, but it contrasts with the almost noodle-like hair. Aside from that, from looking at reference pics, his front comb over looks like it sits a little too high on his head. Try working a more realistic texture to his hair, like you did with the beard.

Overall though, this is a good first pass, your face paints apps are where this pieces shines brightest.