Pretty cool looking man. I love the colors on the first one, but the black and white one looks great too. The only thing I don't like is the smudging on his face. I don't like effects on the face since it's normally the focal point. Other than that, it looks really good, keep it up dude.
Colour FTW. Bit over powering with the blending use alots of slight blend layers to work in your render not just one layer with alot of blending.
I think you should erase that spot near his head, it looks like it clutters it a bit. Other then that it's hot.
