Thanks for the feedback. I suspect that if my account was pseudoanonymous I would feel differently about it. I considered an account with a handle, but don't have enough motivation to finding out if it is satisfying for me.
I'm glad that I tried Twitter, however. It made my views of social networks a bit more nuanced.
I do think I will post my paintings to Twitter as I complete them, but nothing else. At a minimum, it will give me an inventory and a timeline.