Well for starters, it's way oversized for a sig. One thing I don't like about it is the random brightness in the top right corner. You can no light source up there, if anything it should be dark. Your light comes from those light beams you have scattered, which I also think you overuse in your artwork. But I guess for this theme it fits. And one more thing I noticed is your two light beam things are different shades of blue. Match those up for a better flowing sig. So: Size, and lighting.
Alright. The corner light is supposed to treat the actual image as a "card" I guess you could call it. It makes it pop out of the page. It's an effect not within the sig but on the sig. If you can understand it. Size, I agree. Thanks Shades, I couldn't tell if I liked it or not. I did it intentionally because it seemed like too much of one color. Guess it doesn't work. Also thanks Updated
Woah sweet, that's from too human right? (Kinda boring game my bf has it) I like the pic you have as your sig more, she's pretty