I hate this genre
(Spoilers ahead. Read at your peril.)
You ask what genre? THIS => "You spend your hours watching somebody's effing hallucinations/dreams."
Problem is, you find out that it's a hallucination/dream ONLY towards the end of the movie. F this!
I'm not sure who started this crap, David Lynch, Christopher Nolan? But I'm sure I HATE it.
5/10 because it keeps you seated.