The render is looking great ! I really like your style.
I would probably say that the upper body is really well defined, but the hands. Making the bones appears even more on that area would be cool, imo.
Also, something feels weird about your wrists, it appears even more when you don’t put wristband on your character. I feel it bends too much, like it’s made only with muscle.
So yeah, here is my 2 cents.
Also, your posing is baddass.