Well, the random blur doesn't help it, really. The black is kind of overpowering and Futachimaru's centering is kind of boring, you should off set it a little.
Smudged tail looks funny. I also agree with Phidee, all the black is a bit too much, but otherwise the background is very nice. And yeah, centering the render is not a good idea. Borders are also nice.
Otherwise, pretty good for a first attempt. Photoshop gets a bit of getting used to after Gimp, but it's awesomeness. What version do you have?
I think Friday and Nellie pretty much covered it. I know you were probably just experimenting with filters and effects though (which is like tons of fun in photo shop XDDD)