'Nny told me to do it.
The avatar is like a Rorschach inkblot, or the Draw-a-House/Person/Tree Test, or any work of art. It is selected from personal imagination. Consciously or unconsciously, people condense a multitude of meaning into it. They project their personality into it - who they are, who they wish to be, what they fear, what moves them.
So here's an idea. Choose one of your icons, and post it up in your journal. Then ask people to comment with the first thing that comes to mind when they see that icon- whether it's associated with the image, the text, or with the identity/mood they project on you when you're using it, whatever. Free association. See if anything fits.

I have fancier icons, but I love this one at the moment.
darthrami made the icon, Johannes Vermeer made the painting. It's actually quite a small painting. It just impacts hugely on my visual psyche.