There are so many fantastic things about Mr. Nobody that I would definitely recommend it, but there are also many annoying things that could turn someone off. So here is my endorsement, with caveats.
See it: The story jumps all over time and parallel existences. We (try to) follow the protagonist, Nemo, as he lives different lives as himself. It’s not chronological, so sometimes it takes a moment to orient yourself in the storyline. Despite the potential for confusion, the multiverse is actually one of the strong points of the film, if you let yourself be carried along by the stories. You can