hmm.the sigs them selvs are not to bad.how long u been doing ps?..well on improvement the text could be improved and the blending of the render to the sig..but gj on ya sigs
Yeah, the text needs some improving and it seems as though its the same font for all. I say get some new ones; dafont.com has a wide selection of great ones.
Don't use Abaddon so much, use a simpler font. On the 2nd one the render isn't blended well. Also sort out those borders.
also, try to make the border less subtle, by lowering the opacity and/or making it match the overall color of the sig
Try to make different text. The text on your sig whores (=P). Don't add standard Blending Options and use the 'Image - Adjustments'-menu.
Looks like a couple of those renders could be sharpened, but thats just me. The text needs changing like everyone else said.