Well, I gotta be honest - It doesn't look that great. But, from your sigs, it seems like you could learn a lot. Look up some tutorials (tuts for short) and do some of them to learn some new techniques and then let's see what you've got.
it seems like you were trying to use a lot of effects, but they just didnt work out too well. i would suggest following a couple tuts to get the hang of things.
1 - Look Around for "Full Signature Tutorials" 2 - Try Using Different Brushes (Download them on DeviantArt)
I can see you're just beginning and your sigs are a heeluva lot better than mine were. You should use a smaller size, like 350x150 or something similar.