I've dug up these oldschool retail avatars, and I'm sharing them because I figure some of you might find them cool and/or nostalgic.
Q: How do I change my avatar?
A: Click on the "Settings" button at the top-right of the forum. It will be in between your user name and "Search". Once on the next page, scroll down a bit and go to the left side of the screen. Click on "Edit Avatar". This will take you to a page where you can upload an avatar to use for the forum. You can save one of these avatars to your computer, so that you can upload it to the forum, simply by right clicking on it and then clicking "Save As".
There are 4 images in each row. The images go in this order; Level 1, Level 60, Level 70, Level 80.