Adding onto what the other people said...
I like your unique border - you don't see it that much, and it looks good with your Sig.
However, there are a few things you could work on:
Text placement, for one. Your text doesn't fit your Sig, and it's not placed correctly. It kind of becomes a subfocal, and in most cases, your text should
not be your focal.
Go through this tut by Rizla:
http://www.silkroadforums.com/viewtopic.php?t=45409
It has some great information to the Basics on Photoshop - alot of the Sigs that you make will ask you to do what Rizla explains in his tut.
