ok, now i gotta say this , look at sketches 1-3 and you see a certain roundness
in the face that has disappeared in the latter pics, making the face look a bit
guyish to me, like that guy in Clockwork Orange or Jester from Batman.
try making the jaw shadows less sharp , at least in places… and the tip of
the jaw might need some adjusting too … maybe make it smaller or sharper…
also the corner of the eye might use some adjusting…
i tried and applied the photoshop smudge tool on the face just a few strokes,
but already you see the difference , right ?
sorry if i’m causing trouble , just trying to help