Sometimes it rubs me the wrong way and I'm disinclined to read the book, but when it's such a huge phenomenon (Sombra del Viento, Millennium-trilogy, Da Vinci Code, Twilight, Harry Potter,...) that you almost have to have an opinion about it, I'll read it as I want to have something to base said opinion on. Hyped books can certainly be disappointing, but then I usually don't have too high expectations, not unless they're widely acclaimed by more respectable critics as well.