“This isn’t going to be one of those love stories, is it?” Bran asked suspiciously. “Hodor doesn’t like those so much. […] He likes the stories where the knights fight monsters.”

“Sometimes the knights are the monsters, Bran.”

From A Storm of Swords by George R.R. Martin. I’m about halfway through, with the next sitting on my shelf, but that quote about sums it up.