I agreed that the anatomy is better, and as usual, shading and palette are great. You seem to have hit a bit of a wall, though, in certain ways (many portraits, usually bald, rarely with eyes, etc.) Good stuff, surely, but you have talent and it'd be nice to see what you could do if you pushed it.
Don't misinterpret, though, as it's a cool piece, regardless.
Cool piece for just 6 colors.