Hi i have a few suggestions for you one would be add joints another would be maybe add clothing/ armor on the abs and legs and arms and also i think whenever people add cuts and scars and the textures it just adds to it and add realism if its done right but if you not comfortable or formilar with doing that stuff i wouldnt try it becuase it should only be done if ita done right and btw i love the hands can you pm me a watermarked flat of the hands because i want to see how you did the palms of the hands... I mean if you dint want to I understand.

Add some tribals on the hands, and it should be enough.

Maybe add muscles? Well if he's naked.
And a bit of hair won't hurt.

much more work on the head. Could u add a pic w/o the beard?
I think it looks pretty flat and it could use some more details.
Needs more depth to the eyes at least

Add joints and tattoos for the left arm.