I suppose one consequence of being a serial renter that has moved around every 1-3 years is that it changed my relationship with having a large volume of books. Seeing a bookcase full of books does bring me joy but it simultaneously makes me think "oh, I'm going to have to lug all those boxes up and down stairs during the next move". I still have a shelf full of books, most of which I have a particularly fond emotional connection with. But otherwise, I resist the urge to buy more (I have a fantastic library nearby) and shamelessly pare, donate and give away anything I do acquire.