There's so much you put in here that I'm really not sure where to start.
I suppose what caught my attention first was simply the pose, since I'm really not that skilled with poses. Second thing I noticed was the hand and the blood :3 I love that stark contrast of red against dimmed colors, which not only you used for the blood, but for the laser points and the thermal detonator as well.
Those are just a few things I can point out that I really like about this pic As for the other colors, I'm pretty impressed. The shading is wonderful, and I love the roughness in some areas. Overall well done, and I will definitely be looking forward to your next work :3