Try making a sig with no stocks, and no brushes.. only default brushes. Right now your style is way too grungy and really craps up the sig IMO. I want to see something smooth and clean from you.
Just something really smooth with no stocks or brushes kinda all over the place.. the biggest problems right now are the flow of your sigs and the text.
More along the lines of the portis sig I made for comeback. I used no brushes in that and made the render and text the focal point of the sig. Backgrounds aren't that important (so they don't need to be overdone) if everything else looks ok.