I have. For the few things that were published, I never go back and re-read, because should I, heaven forbid, find an error, I cannot change it, and I know it will just continue to eat me up.
I have not self-published, yet, so I cannot say if it will be the same then.
For the novels and stories that have not been published yet, then yes. I often return to them to see if there is something that can be improved or fixed, especially if I am planning on submitting/publishing.