I don't think you need those black lines in your sig.The picture in your sig just doesn't seem right.
Yeah, from the sigs I seen you make the main PSD is usually distorted. It would look better if you just left the PSD as it is. Otherwise it's decent, text can use some work though.
The shine effect I put on them sometimes makes it distorted, just experimenting.I'm always trying something new whenever I make a graphic, I don't really know alot of "tricks" so I just try some new things everytime, see how it comes out.