The BG(background) goes pretty well with the render.
The blending is okay however the lighting is off.
Try adding a light to the top right, in the middle of the sig. There are a few different ways to do this my favorite is:
use a soft (0% hardness) 100 px 80% opacity brush.
create a new layer and fill it black and set it to linear dodge
brush once in the color you want your lightsource to be.

I think you should read up on the rule of thirds. Compositionally i think you need more bretahing room between the border and the render.
Wikipedia rule of thirds

Finally a good text that would work well with this would be something like arial, or eurose (if you have it).
But text is hard to learn when you still beggining a more imortant focus is the rest of the sig.