I was almost convinced that the second and third were saved in jpg format. They're a little choppy on the sides but I can tell that it was what you were going for. The second one is the best out of all of them, but you need trk on my problem that I first had.

My text was all weird and made no sense. Say, the first one, you used that-font-that-starts-with-an-E but it really doesn't go with it. Since the signature is all solid colored and the shapes are more larger and bubbly, you want a bubbly font such as Carbon Block or something. Or say, the second one. The text isn't positioned in a very good place, it should be placed to the left of the character. Also, since the background would be darker, the text should be opposite and in this case: semi-bright (light blue to light gray).

But that's just what I think