Fight club was intentionally misadvertised seeming like it would be some dude bro 'FIGHTING IS HARDCORE AND AWESOME LET'S CHUG A BEER' bullshit.
Completely ignored it for that reason until there is nothing better on TV so I said fuck it I'll give it a shot and holy crap did that destroy my mind.
Watched it at a cinema when it first came out - thought it was ok, bit funny, nothing special. Watched it again a couple of months ago on DVD. Completely changed my view of it, for the better. Great film.