"Have your book-tastes changed over the years? More fiction? Less? Books that are darker and more serious? Lighter and more frivolous? Challenging? Easy? How-to books over novels? Mysteries over Romance?"
I read fiction over nonfiction at a ratio of about 9:1 in my younger years. Now I read nonfiction only. How-to books and cookbooks have always been my friends, though. I never read horror or true-crime now, and it's been a long time since I dug into science fiction. Now I read books with more world-views. If I ever sat down and wrote the fiction books I want very much to write, I would probably pick up fiction reading again, but for now, fiction feels more like a repudiation than a pleasure.