Lol, the quote is so epic. I like mine better...
"Heals? You die before I can cast Flash Heal bro. - My priest to a failure Blood DK tank
But on your sig, 7/10 Definitely.
The text seems a bit too generic, but I think you could use that same font and throw some effects, maybe a gaussian blur... Did you render it in Illustrator or PS?
Also, the blur on the left side is a bit heavy, but I see where it's going

I should actually sit down and get serious on a signature... most of mine are me trying to be silly/wasting time.
lol xD
-Edit
By Blur, I meant on the character model, not the BG.
Blur works best(In my sleepy opinion) with something to distract them from it, like a foreground image in conjunction with the blurred image, like say an explosion, or something bright/animated.