I don't recall what I started with. The issue was raised however of "Why don't people change their avatars more frequently?" That caused me to look up the definition,

where I found that it was a changing image of a Hindu Deity. Inherent in the use of the word was that it would change periodically. I found that fascinating.
My second Avatar was an image of the Liberty Bell that Cyan found for me, and gave me help on uploading. I selected it because I felt it represented a voice of freedom heard too infrequently in the land; and because, like me, it was cracked.
My current avatar, a pocket full of pens and pencils reflects a long habit. In sixth grade, a fellow student stole my pencil in the middle of a timed test. Since then, I have always had at least two writing implements in my pocket. At the moment, I have two of my four Parker Pens

in my pajama pockets. The Parker pens are a signature. I have carried them for over 40 years now. One of the two in my pocket ran out of ink, and I needed a refill. My past experience had always been that the pen was lost before I needed to buy a refill. I usually also carry advertising pens and the like in case someone that I don't know wants to borrow a pen, and a pencil or two for my daughter.
On the job, I wore a shirt with two pockets, Bib Overalls with a ruler pocket, and a hammer loop, and a coat with at least four pockets. All the pockets were filled beyond design capacity, using such techniques as hanging a hacksaw from a tool handle. When asked; I would explain that my job might require me to drive miles from my toolbox, walk through a control room, then the length of a bldg., then out to a tank farm, and climb to the top of a silo. About that point, I really didn't like to discover that I left what I needed sitting in my toolbox.
Out of self defense, I have taught Paladin Elspeth

how to change her own avatar. In the past 24 hours, I have seen a rotating piece sign, a light house (which reflects not only where we live, but an on ongoing project in the front yard), a dancing frog with a cane and top hat, and when I last looked, the lighthouse again.