I never really rewrite fan fiction. The only thing I've rewritten is the first chapter to
Ringing in the Sane, because I really didn't like the first chapter. But this was about a year after I posted it.
When I write original fiction, I
need to rewrite it. I don't know why I can't get it right the first time, which I seem to do with fan fiction, but I just ... can't. I just want to change
everything. (Also, in the longer work I'm working on, I keep forgetting the facts and so I change them and it's all a bit confusing, so I really do have to rewrite xD) I think of a plot, and then I start to write it, and then I start to change things and want to reorder events and ugh.
But it's good, because I'm improving on it.
I also like to change tense. The first 30,000 words of the longer work I'm working on are in past tense, and the other 15,000 are in present. That's going to be a bitch to fix