It really looks nice! I really can't think of anything to complain about (I'm not much of a critic anyway).
Hmm, you're background shouldn't be too busy, but at the same time you shouldn't have it empty. Right now it's pretty empty. When you make your background try to pick a color/texture that will make your foreground pop out, or add some analogous colors. Ex. Spoiler Green=Secondary color Red=Primary color So if your foreground was Red, you might want to make your background green. This is called using complementary colors. Pink, yellow-green=complemtary colors. Check this link out on color theory. Also you should check with Misty, or another Graphic designer on standard signature sizes.
