Are you a spine breaker? Or a dog-earer? Do you expect to keep your books in pristine condition even after you have read them? Does watching other readers bend the cover all the way round make you flinch or squeal in pain?
Oh no NO! Spine breaking is about the worst thing you can do to a book! I accidentally put a crease in a spine of a book I was taking pictures of for a school project and I felt horrible! I just looked at it, poor book! I may have dog-eared in the past, but not for many many years, or maybe I'm thinking I used to do that and I didn't really! I would never do that now though!
I like to keep my books in the condition I got them in, if they were new they stay new if they were used they stay the same level of used. I would never buy a book with a cracked spine unless it was like 25 cents and I book I really wanted to read! It totally bothers me when I get smudges all over the covers but I don't know how not too. Sometimes with paperbacks the covers bow but once I'm done they go back into the shelves and straighten themselves out. I always remove dust jackets when reading a hardcover book. I do take a book on the bus with me but it has it's own pocket in my bag so it stays pretty protected.
You know it's funny, just the other day I saw someone dog-ear a page on the bus and I flinched!
How do you feel about the condition of your books?