V3 is the best imo. Try to blur the backround, and maybe blur the fire in front of his arm. Has some depht issues and the overall darkness and lightness could be made better.
ahh well you make pretty good stuff for only 2 years.
Personally i stay away from sigs because they are a pain in the *** to make. But i've been going at photoshop [and digital design as a whole] for about 4 or 5 years now