What was the last book you read, and what made you pick it up?
Before having children, I read a TON. Fiction, non-fiction - anything that intrigued me. The constant every night was that I wanted to read a book. The variable was my mood. So it was common for me to have a stack of books going at the same time.
In my twenties, I then started a book journal. Have you ever heard of one? i found that I read enough to actually catalog the books I'd read complete with a rating based on how much I liked it. This was before (or perhaps just in the early days) of online sites such as Amazon ratings and Goodreads comments. And I didn't particularly care to share my ratings with others, unless a conversation with a friend led to suggesting a book. I just assumed that as I aged I might forget where I read that interesting passage or fascinating tidbit and wanted a place a reference.
I didn't need to worry too much about my reading library getting out of hand, because something (or someone) came along to put a halt to reading.
My average number of books read per year quickly dwindled from a couple dozen to...