I think I would miss sharing books. I keep a lot of books on hand but I am constantly passing books on and sharing with friends with the understanding they get passed on, so my personal library always changes. There are a few I will keep and want back, any of the Quilting Series books and things like the Number One Lady Detective Agency series. Otherwise books don't stay at my home long. Our YMCA also have book exchanges you bring books and take books for free.
I keep thinking about the Kindle, but have not seen one up close and personal, maybe when I do I will change my mind about getting one.