Oh, I forgot all about this. Thanks! And my avatar is a red square because, originally, I didn't want to have an avatar at all, but I found it was annoyingly hard to find my own posts in a thread (when I was scanning through to see who had replied.) Plus, having no avatar makes it harder for people to remember me.
The red square sticks out and is easy for me to find on a page; and, I assume people remember it a bit better than having no avatar at all. So I use it.