None.The current one whitout dragons looks better.
I personally think they're too big for a siggy. Those are almost the size of a full wallpaper.Also, I'd make the text smaller to not draw attention away from the dragon. I see the text before the dragon. It's as if it doesn't even exist.With that being said, I like the 1st one if you can do the things I mentioned above.
I don't know as my Fiancee did them for me Maybe I can ask her to edit them and make the text and the sig smaller I has no clue in this sort area xD
What graphic editing program do you use when you're making signatures?