You guys bring up a good point. I actually WANT to give out different "stars" but there are a few issues with this. If you can help me out in finding icons which adhere to these rules I will gladly enact them:
1) The image can be 16-18 pixels wide and 16-18 pixels high, (I often add extra space around the image to make it approximately 18 wide and 18 high).
2) The image has to be clean and sharp, so you can't take a larger image and scale it down, otherwise it gets all anti-aliased.
3) The image has to be video game related, look good, and "make sense" (i.e. 5 stars next to each other makes sense, but 5 mario heads wouldn't).
And that's about it. If people can find some icons which meet these requirements I have totally up for adding next ones to the mix.