This question was inspired by one of the thread on most reread books. It got me thinking, with all this rereading going on, well... why? What is it about a book that makes you want to reread it? Simply a matter of quality? Except I know that's not the only reason for me. I've noticed a few trends, too... often favourite books from youthful days are reread. But why? Nostalgia? A sense of connection with your own past?
Does the context of reading a book matter? Like, rereading a book that you read at the cottage when you were sixteen during the greatest summer of your life? Or is it something about the connection with a particular story or character? And if so, is there a common thread among the books you reread? Is there a common element that pulls you back to reread books?

