it isn't to bad,but you could add a few levels and curves layers in it,also take a soft brush and make the left side of the sig where your render(looks like the winged dragon Ra from yu-gi-oh sorta)fades out darker with black and the saem for the small area(bottom right corner) where the text is darker as well,btw the quality doesn't look top notch,turn up the quality to the max after you've finished a sig in ps :o

It seems... I don't know. Technically, it's fabulous. But it seems rather lifeless, as if there's nothing that you want to convey.