Some nice details on here so far. Bonner Orcs are cool.
This should be really cool once it's finished.
I guess the things that stand out to me are some contrast issues:
The shadows under his arms and on the side of his torso are very dark. Same with between his legs (almost showing up completely black on my monitor).
One of the best advice I ever got about painting (and I need to do it more myself) is to not let the interior shading override how the overall form reads. Right now the contrast between the high and low points of the shoulder muscles (and in a few other areas) make it feel like the bulges are way bigger than you might have intended. The extreme highlights kind of make it feel like he's glowing beneath his skin which may be the waxiness others have referred to.
The anatomy of the abdomen and back look a little odd to me, and his pants look a little too skin tight. I agree with Shotgun in that the face should probably be highlighted more than the rest somehow, whether it be by darkening the rest a bit and/or reserving the most contrast for the face.