Moving from paper books to a kindle means my tolerance for poor quality writing has dropped massively. Instead of a few books waiting to be read and the need to hunt around bookstores for replacements I've got a dozen books I intend to read already at my fingertips and millions more a few minutes away online.

If I decide a book is not worth continuing (even if I spent money for it because the free sample was inconclusive) then I won't continue it. I'm too time poor to waste my life on bad books.