I don't tweet nor read tweets. I would feel like an egoscentric tool to think people are concerned with my thoughts and goings on during a typical day.
I almost never read tweets. Especially from heavy tweeters. It's like trying to drink from a fire hose.
Yes I read all of my tweets. If I'm not interesting then I won't follow the persons tweets. I do however turn of my notifications when I got to sleep. I crave the latest news...and always want to know what's going on before my friends