I quite liek those clipping masks to the left of the spartan, but I can't help feelign his visor is a tad oversharpened on the right-hand side. In fact, his forearm closest to us is pretty sharp as well.
EDIT: Saw them already lol You are an EFFING PRO with colors, man. Love it. Basically, my thoughts were already said by Knight Kninja Off-topic: Why you no replyyyyy it makes me so sadface
awesome colours and wireframe were the first i noticed. meh i don't like the text as much in this one.. maybe its the rounded edge font, but thats just design preference eh? so i like your effects, especially the dust effects with the splatter brush/clipping masks.. overall, a nice sig, not much to say