I know who you are. Your TBR pile extends to TBR rooms. You know you've got a certain book, but it may take you a day or two to lay your hands on it. You periodically find that you already had a copy of a book you just bought, but you don't mind. It's always good to have a spare in case the gremlins steal one of them.
Some people love books that much. I love them, too, but in a much different way. As soon as I finish a book, I give it away. I love sharing reading with others, and I don't mind a bit if they pass it on to someone else when they're finished.
Despite my ravenous reading habits, therefore, my home is not filled with books. My head? Now, that's a different story!