Having thought about it some more, I've decided that Twilight (the movie) is a failure because I felt mostly nothing except the desire to slap people for being idiots or smiling slightly when Bella gets kicked around.
The movie should not depend on people having read the book (and I have not read it) in order to fill in or substitute for character or plot development. I don't care about any of them (the closest thing to an exception is, strangely, Bella's father).
I spent more time judging people's looks. I think Robert Pattinson looks awful. Emo, wangsty, and half the time wearing a smug, shit-eating grin I find repulsive.
I also thought, after seeing the glittering-in-the-sun bit, of good witches in Sims 2 from the Apartment Life expansion. This is bad!