I have a book-owning problem, a logical consequence of the book-buying problem I had for ages. The book-buying problem was especially bad when I was in grad school in Iowa City: not only did I have to buy books for school, for fun I would wander into Prairie Lights Bookstore on my way home and see if there was anything interesting on the remainder table (and there almost always was).
The book-buying problem is pretty much under control these days; I get stuff from the library and only buy things I a) must have for a project or b) know I'll like because it's by a writer I love. The book-owning, though still a problem, is not as bad as it used to be, because I've been reading stuff on my shelves and realizing that I don't need to own a lot of it any more.
Sometimes this is a cause of distress, as when FINALLY I read Franny and Zooey after owning it for almost three decades, and realized I HATED it: pretentious prose, annoying characters, and not that much actual story. I hauled that book back and forth across the continent more than once, when I should have just started it one night and put it in a box the next morning to take to a used bookstore.