I have a lot of novels that I haven't finished. I usually get 150 pages in and I realize it's not going anywhere. I don't publish everything I write. I must have six unfinished novels at least.
Some say we are responsible for those we love. Others know we are responsible for those who love us.
It's fun when you start a movie, because it's kind of like you get to go Christmas shopping... you get to make your wish list and you start thinking about what each character needs.