Is there such a thing as too much wish fulfillment?
The Twilight series built its fandom on huge, pulsating, throbbing, shiny shiny heaps of ethically twitchy girly wish fulfillment. The "final" book, Breaking Dawn, was the biggest, shiniest, most pulsating heap of wish fulfillment of all, a professionally written version of the eternal, deathless "happy family" fanfic.* And yet the readers rejected it. Why? Where did the book's emotional appeal go wrong?

* You know the one--two random canon characters fall in wuv, get married, and proceed to fill their house with babies, adopted kids, traumatized war orphans, assbabies, and a menagerie of pets. Cooking, sex, and wacky hijinx ensue. The most important question is: Which of Family A's children (who are carbon copies of their parents) will fall for which of Family B's children (ditto)? Often involves masterpieces of the "assbaby labor scene" genre.