I like the colors you used, it compliments the signature very nicely
The effects are nice, and has a nice flow to it.
Lighting, i like what you did with it
The popout isnt bad.
The border is fugly! i really think this would look nice with just a regular border.
The bottom text.. its just out of place and looks pasted on. and takes attention away from the actual focal
The topaz, its to much, tone it down or get rid of it.
What you should work on
Try making a regular sized signature with no flashy border, most the time they look really beginner-ish
Text, don't even worry about it for until you are comfortable with it, most the time i just leave it out.
Keep working at it.