
Render sticks out too much. Don't center it. Background should be less cluttered, things are happening everywhere, thus my eye draws automatically to the background and not the render as it should be.
The render's light source is towards the right while the signature has the light coming from the right. You need to work on that.

No light source at all. Render is too much positioned to the left and I really don't like pop-up signatures. The render is poorly cut and you can clearly see the lines of it. I don't like this signature, sorry.

The best of yours. The light source is still misplaced though.

No. No. Awful font, awful text, bad render, misplaced, crap background. Sorry.