the key basic of gfx is having something pretty to look at, and yes u may have your own style but something every style should have in common is a focus point something the work wraps around so you see this first an then look at the overall work but if there is nothing that catches my eye about a sig when im on a forum i dont even stop to look at it, In yours its the text which isnt that great. The point of a focus point imo is having one part of the work weather it be poster/sig/w.e is to stick out and garb someones attention so then they look at it all.
hope that some what betters ur understanding, make ur sig anyway you want but at least follow the basics.
For the sig itself I hate triple h so i dont really have a comment on it, just ur blending could be a lil better on the center pic, just looks like you blurred its edges into the bg you made, id try adding some brushing on top of the pic