Some great work here but a very inconsistent portfolio on the whole. You could be selling yourself a lot better than this.
I think this is a stronger avatar for you.
You have quite a bit of duplication: you duplicate ideas and models quite a bit. That's the first place to start.
This looks underexposed:
The arm and iffy BW conversion make this quite a mediocre nude along with its partner:
In this one my eye goes straight to the retouch on the guy's face - not too hot.