Okay... Hmm.. First off, most people dont care for mirrored sigs. The more randomness for an abstract background, the better (within reason, of course). Your pic on both sides needs to be cut out. Just use the magnetic laso in photoshop, and cut it out. Also, most sigs look better with a black (in most cases) border around them, or 1 pixel white, then 1 pixel black, to make the border stand out more. It's a good first effort, and being that it's your first sig, it's pretty much expected that you don't know about these general rules.