I don't buy books until I have read them and really really enjoyed them. (Unless they're like dirt cheap) I kind of thought this was the norm, and that everyone did this, until I started seeing book hauls and brand-new hardback books in my friends' arms.
Personally, first and foremost, books are expensive.
Like I do not have enough money to buy a 20 dollar book that I'm not sure will be worth it yet. One time I earned 300 dollars at once and I got super excited to read a ton of books, but that's only 15 books. Books are almost as expensive as some clothes. It's crazy.
I always borrow books from the library, or my friends (I've been known to treat books well, because I understand that they're like babies) before I get them. This way I can make sure it'll be worth the spending, and I also get to ponder if it's something I'll reread. The one time I didn't do that in recent years, was If I Stay, and that turned out to be a huge disappointment.
But I definitely think there are some benefits to truly owning a book. It really makes you feel good as a reader reading it, and carrying it around, which is almost as important as what's actually inside the book. Not to mention the amazing feeling of just STARING at a perfect book. Happiness right there.
So what do you think? Do you haul books, or are you more of a read-then-buy person? I'm curious. :)