How Do You Judge a Book?

As a reader, I spend a lot of time analyzing fiction. It's automatic for me, like breathing or sleeping or ordering from India Gate when I don't feel like cooking. I've tried to read solely for enjoyment, but on each page, I catch myself identifying and thinking about the elements, styles, and constructs that make the book jump or fall flat. I wonder what the author was thinking here and there. I consider what I might've done differently in a scene or with a character or relationship. And...