I love libraries, the problem I always used to have was they either didn't have the book I wanted so I'd have to request it in (usually paying a fee), the book would be out etc
Given I tend to like to read entire series of books waiting several weeks between every book in a series that had been fully released 10+ years ago was annoying
There was also the practical issue for me of getting to and from it.
At one point I was going to the library every week or two and had a full card, and at the same time had probably a thousand+ books in and around the house. I still sort of regret the big cull I did in my early 20's, I had a very extensive run of the Doctor Who books up to that point as I'd pick them up whenever I saw one.