I've sometimes read romance novels, more a function of my reading appetite at the time, plus no books remained in the house except those, I've also read a couple of -video-game stories, including some vampire ones to be relevant for your example, I agree that they have mildly interesting twists, enough for guilt pleasure level.

I can't put a name to it, but it doesn't require such a leap to see the relation between reading things like tvtropes and then to an extent Twilight? on that note, what do you read for fiction generally?