Man, Memento is the one Nolan movie that I just cannot get on board with. Great little film-school concept, but it sooo does not hold up to feature length. I always start out really liking it, and by the 40 minute mark I cannot wait for that thing to be over. I don't know whether it's just too inherently gimmicky of a concept, or whether the actual story in Memento when played forward linearly is just extremely boring. I think that idea could maybe work great for a spy thriller or a phillip k. dick-type sci-fi story, but maybe it really is something that should just be a short-film.