it defently looks simple. The problem in this sig is that it isn't blended at all, and the bg it seems liek you weren't sure of yourself.

Liek you didn't like it so you painted black and blurred it to make it get covered up more. Get rid of the black. And work on blending the render. I'd recommend a vector c4d behind him. I think it'd help you a lot.

Also i agree the text des need work. Use a fefault look font like arial.

Also think of composition next time yu are makign a sig. FOllow the rule of thirds, you don't want your sig smack in the middle.