I personally think that it would have been better with no border what so ever. Reason for that is, near the edges it seems to gain a lot of depth and be sinking off into the background, the border kills that for me.
All your sigs are someone the same. All you use are anime renders, put a kinda spiderweb background put a glow add text and BAM. You need to start experiments more with different techniques so that your sigs don't all look the same.