Is this good or not? i think its not but.. From this tutorial: http://www.sigtutorials.com/tutorials/basics/fire-effect-signature-tutorial.html
If thats one of your first signatures, it's pretty good. I would lower the brightness of the render and the stuff around it though. Try adding some C4ds to add effects into the signature. I like people who actually use a tutorial to get their own signature, not just use the same c4ds, renders and everything.