Nolan endings
I thing the biggest weakness of Nolan is his endings, they are mostly disappointing and leave a bitter taste. For example in TDKR, the movie wasn't great already but the ending is a disaster, Bane is killed like an insignificant character and then the movie goes dowhill very fast up untill the stupid nuke and Robin replacing Batman..
In TDK , the movie is great untill the last action sequence where Batman chases the Joker in the building and captures him, I hate when he's wearing the goggles, the sequence was boring and useless, Joker is captured too easily compared to what he's done through the movie.
In Interstellar, the movie sinks when Cooper wakes up in the hospital in the future, it becomes a big fat joke in the last 15 min.
In Insomnia, the movie ends with a disappointing confrontation, Al Pacino shoots the crazy guy and that's just the end.
In Batman Begins, Razalghul is killed by a falling train.
In Memento, I don't remember but I was disappointed by how it ended.
Conclusion: Nolan needs to work on his endings seriously.