The idea was ok, but it went totally wrong.
Let me give you some ideas about a signature..
* Always look for focus and depth.
* Never just paste psds that all of them have the same effect, opacity...etc when like (in this case, the two psds on the right) are having the same opacity (etc..) as the main psd. (the two right psds were meant to be bkg psds).
* Blend your work.
* Text can either downgrade or improve the outcome of your signature, most people never pay attention to the text. So that would degrade the signature believe me. Try to compensate and improve the text with the theme.
* Tiny signatures usually never expose the flaws and the weakness you got.
Keep working and try the tips i mentioned above.