WOW GUYS.Break it please.
I'll judge the sig so please shut it up for a while :P
First of all I have to say that this is not art.
I don't wanna be offensive but by merging the wings,the background and the render you just destroyed the signature.
Wanna know why?Have you ever heard of a word called depth?You know d-e-p-t-h?
This "thing" does not exist in your signature.That makes it flat=crap!
Try to use the blur tool to blur the b/g a bit and the sharpen tool to sharpen the render...
Ok now let's get it on...
Why do you use the same text style?You have to try some new things.That will give you some experience...
Another thing that I noticed while I was looking at your sig is that the colors are shitty!
Violet/Orange Gradient map on normal(20-40% opacity) asap!
Last but not least,it's too much.Remove some part of it.Make it darker on the edges,put a lightsource and add some black borders.
Friendly,MasterDisaster