Great to see you back on track man , which makes me wonder where's the rest of our SSG ?
Tips and notes:
The skulls mos def need work, esp the lower jaw is protruding too much.
That painted girl needs some work - the scalp is out of perspective, more highlights will help too.
Keep pumping out those poses and faces, but watch for proportions, they're a bit off in some places (your recent ones).
I dig the arm studies stuff and the poses in the post before the last one, well done.
AND KEEP IT UP!