Does it have to be only literary or only interesting?
Ideally I would write a literary book that would also be humorous, interesting, and accessible to people who are afraid of the ‘classics’ or booksnobs.
But, you know, if brainless and fantastical series rise to prominence (or the New York Times bestseller’s list) they must be doing something right. People identify with books that say something about human nature or themselves.
To take the Twilight example, Stephanie Meyer is acutely aware of teenage girl fantasies, and writes to appeal to that audience. In that sense, it is very successful, because she has embodied the psychology of a certain sector of teenage girls/hopeless romantics.
On the topic of Twilight: the first book was the best. It had romantic tension and cuteness and was an enjoyable read, even if it’s not ‘literary’. The second one is basically all angst because the main girl is too dependent on her vampire—that’s a seriously unhealthy relationship dynamic right there; the third book is an overplayed love triangle, and the fourth is B-movie-horror-flick-creepy-love-story. But don’t let that put you off if you haven’t read it. Stop at the first book when you still like the characters.