It's alright, I think. I give it a 6.5/10. I like the background, but I think the character doesn't suit the overall style of the signature. It seems dark and gloomy, when the character isn't, both in personality and the image you used. The text below the character is also very dark for the most part, making it a bit hard to read.
EDIT: Lukyas beat me. ;x
It's alright. I'm a bit tired of seeing Prince of Persia art from you though, but that's just me. The background is pretty nice, but I think the character's colors don't blend in so well. Also, the text is a bit hard to read against the background. I give it an 8/10