not trying to say that you 'suck' i just think you should keep to the basic stages of sig making before going into animation because after you mastered still sig making you can add then animation and then it will look good. I'm no master and making them myself but im still learning but ive come along way since i started
some crappy ones messing around with brushes and effects
and these two i made recently
in the eyes of a pro these sigs are probaly very basic to them
all i can offer in advice is to do tutorials and mess around with them to find your talent
http://www.pixel2life.com/forums/index.php?showforum=22
some good tuts on there that i use to make most of my sigs but the best thing to do is not to give up if you dont succeed (no cheesyness ) because you have the enthusiasm and effort to become good.
Good luck