I get enjoyment out of writing, but I get absolutely no enjoyment out of rewriting, so I don't do much of it. The more you work on something, certainly, the better it gets. But there's also a pretty clear law of diminishing returns. It drives me crazy to do readings of my books, because if I read anything I've written in the past, I'd like to almost rewrite everything.
No matter how individual we humans are, we are a composite of everything we are aware of. We are a mirror of our times.