One of the first laws of writing is: be nice to do those who give you money.
This isn't quite as important as: have a spouse or significant other with a good day job. (But it's up there.)
It's kind of a relief having the book out of my hands. I believe one famous writer once said something like, "finishing a book is like taking a baby out in the yard and shooting it..." To me, finishing a book is more like seeing your baby walk off to college for the first time.