Very colorful. In sigs if you have too much color it can be bad.
It just gets distracting and afterwhile you start to count the number of colors :P...In song.
*papa starts to sing* blue, purple yellow red now the colors are in my head.*

Anyways, i think you could try to get rid of a couple of them useing gradient maps set to low opacities and blending modes such as soft lght, or you can use photofilters.

There is always the option of BLack and white too which i personally love

The blending is looking good you got that down pat man, and the BG blends very well with the render, i almost had a hard time decifering which is which in the beggining.

The text is ..odd. Try and use defualt texts, and though that looks like it COULD be a default font lol, that isn't what we meant.
When we say defualt font's we mean arial, veranda, tahoma, eurose etc. Try a couple of those I bet they will blend a bit better.

As far as placement goes i think you could afford to make the text a bit smaller and mvoe it ontop of the left shoulder of teh render. I think it would blend prettyw ell that way and add a lot to the sig.

The border is looking nice very good and goes well with teh sig. Nice job. Keep at it, it will get a lot better and easier over time.