There is too much, the render is oversharpened. It is just messy. The text is distracting from the focal. It is really hard to see the render here. Since I did not see your other signatures, I cannot say if that one is your best one but it is pretty nice as a start. Try to just go with the flow and add a better combo. Instead of sharpening the render, blur and burn the background so that the render will not be oversharpened. You can use some adjustement layers, too. The green there with the orange/red color is not fitting very good. And at the upper part of your sig it seems a bit strange, the effects are just ending there suddenly. Try to read some tutorials or use some labeled Psds. (this is no offenisve ) Keep practicing!
