A tip: focus on the resolution of your resources and be careful when resizing.
The first signature is either a super-failure or a lucky success,that's usual,what you're trying to do is to "put a bunch of everything" in your sigs.
your actual sig (http://imageshack.com/scaled/large/41/1g3w.jpg) has a city as background,a blurred face (hurr face syndrome ) and a low quality c4d,with some blurred layers used as light.
Anyone starting should try to focus on one aspect.
This means next sig you'll make should have the least blur possible,one other is centered on the text,one other is focused on the background.
It won't make you do great sigs,but you'll see yourself how each thing works out in a deeper way;then you'll start making signatures with all what you've learned.
The first sig is always bad,pointing it out is pointing the obvious,so you could be soft doing that.
Generally,the first signature is something like: look at this dump,wich is the worst thing in there? And eventually the best one if there is one?
Then the OP should take advices and slowly start making best sigs; focusing on what he/she does worse and what he/she does better.
Anyone who says "it's good" and doesn't add anything else is doing it wrong.
The sig is bad and supposed to be bad,it's been posted just to know where to start improving.