the ears looks good, if you are going for a common guy, use ears top lined with eyebrows and bottom lined with nose.
the round shapes on hair shading doesnt work so well, you first need to think of the hair as clumps, if you think right it goes from somewhere in the top of the head and reaches its tips, the clumps are from the top to the tip and the shadow of it must coincide.
I think when two clumps meat it creates a shadow and the shadow doesnt go round.
Set
I learned about gradient maps not so long ago...
cntrl + paint
I'll add colors to the parts and polish it afterwards.
Hngggggggg