DUDE, it just ----. choose 1 render. make it alot smaller. e.g. 400*130 looks plain. blending needed. use levels and gradient maps. just follow tutorials. please.
That was a little harsh... By looking at this I assume your pretty new to GFX. Try taking tuts to learn more on making effects, adding flow, depth and other things along the lines of that.
You mainly want to keep sigs small. 400x125, or something around that. In your sig, it sort of looks like you just pasted the render stock into photoshop and saved it as a photo. (Because of the sign on the borrom.) Be careful if you copy images like that, that can be played as ripping and will get you banned from forums. Another thing also is if you only have minutes to spare, don't bother making a sig, because it will turn out really bad. Just follow tutorials and welcome to the experience