I got a rewrite request this afternoon from a market I really, really want to break into. It wasn't an easy rewrite, though. I like rewrite requests that go, "Can you cut 500 words and tighten the ending?" This one required me to--gasp--THINK.
So I went for a walk and thought and thought and thought, and when I came home I made popcorn and cut the entire climax of the story and rewrote it from scratch. On balance, I added almost a thousand words. The story is much, much better now. Even if I don't sell it to this market, I'll sell it.
Tomorrow night, after letting it rest for a day so I can go over it one more time with fresh eyes, I'll send it back. I do not like letting rewrite requests sit around weighing me down.