It seems like Nolan used to make interesting movies that, while not always great film, at least had something unusual and interesting about them. Memento, for example, wasn't the most amazing masterpiece in the history of cinema, but it was solid, and the backwards-chronology as a narrative device was compelling.
But increasingly, Nolan's films are trending towards the dumbed down, using shallow and boring twists in place of actually interesting writing and direction. It seems to be a profitable strategy, and I can't blame the guy for liking money, but it's also sad to watch.