I've got a few issues with your signatures; hopefully you can take something from this:
1) You've put flowers and butterflies and doves in Winter and Autumn, that just doesn't make sense.
2) You've used 3 different fonts for a design no bigger than my thumb.
3) You've used that bloody script font, which has been used by almost every single member here that contributes other than myself, it's an easy escape.
On the plus side, the colours aren't bad, the background effects are nice and you've kinda made the over-use of opacity work, somehow.