I'm currently rewriting one of my more recent finished manuscripts, Young Nostradamus. This one's about a teenager who discovers he's a clone of Nostradamus, created by the US government to help them predict terrorist attacks. I thought it was pretty darned good, but when I sent it to Flux, they rejected it. Too much like the last book, they told me. Plus, do I always have to write about the kid who gets picked on by school bullies?
I do that a lot, I've noticed. I like writing about the picked-on people who become heroes. You could say it's a theme of mine. However, Flux didn't want another one of those stories, and felt it didn't suit the character or the story, anyway. I looked back over the book, and discovered they are right. Some things you just don't see unless someone else points it out to you.
Flux is willing to take another look, provided I make a few changes. My agent has already sent them the first three rewritten chapters, and I'm hard at work revising the rest of it.
Writing is a continuing learning experience, and I'm very lucky to be working with people who are willing to give me the feedback I need to hear.