Now don't take this the wrong way. I like the site but I am going to give you some constructive criticism it has helped me it the past when people are honest.
First thing I don't thin I like the background and I can't even offer a suggestion to fix it just looks to play not eye catching and I kind og get lost looking at it.
You should also make the pop ups a little smaller it takes up way to much space. If they want to see the image bigger they should click on it. The pop up should be a preview. Also when you hit back it doesn't go to the page you where just at or at least back to the home page. And last you should use friendly urls. For example this is what comes up in the url when you go back to the home page
http://www.drawavatar.com./home.php?ie=n
If you use friendly urls the search engines like it much better and it will help your placement and page rank.
But like I said I like the site the design is nice and fluid easy to navigate. These are just suggestions to help you out.