Honest opinion is greatly appreciated. Just take the time to say "I like" or "I don't like" if you aren't in the mood to CnC please I can take it eDiT ~ Quality looks really bad. Is there any way to save it differently to improve quality?
To start, if you want your sigs to have better quality, save them as .pngs instead of .jpegs. The sig itself is alright, but the multiple light sources aren't working that much here in my opinion.
Some the effects look pretty good. They show improvement. However, as the above stated, work on getting one light source and working that with your render/stock. Still, Your effects are getting better though, keep it up.
It's a cool bg and all, but I just don't think it's meshing with the render very well at all. Use the burn/dodge tools to fix that lighting and make it fit better.