This is amazing. There is no other way to put it :). I love how you used the travel lines, and the blue and her character blend really nicely together. My only comment is on the uppermost right hand side, which looks grainy in comparison to the rest of the signature. Same in the bottom middle left area. Also, the underside of her arm looks poorly cropped. Nice work though! :)
I'll CnC, but it won't be pretty. First of all, you need to find some tutorials, and that's almost not even a suggestion. Why? Well, it's pretty simple, you're not progressing at this at all. I suggest you at least look at some of the sigs posted around in graphic art. You'll notice the difference, and anyone with a bit of experience at PS will tell you the same. The only good stock there is the Ashe one. The other two look really bad. Try to always aim for the greatest quality. You need more blending. None of these have any blending whatsoever. You can't just paste something on a pretty background, and then just pretend your work is finished. That's somewhat sloppy, in my opinion. Practice with tutorials, that's what I'll say instead of making a long paragraph detailing the flaws. I know this may not be what you wish to hear, but it's what you need. I know you can do better, and it's about time you stepped it up.