Great Movies that I Hate could be a thread unto itself... "Super Deluxe Unpopular Opinions."
Films by Fellini (after La Strada), Scorsese (Before Last Temptation) and a couple of Kubrick
8 1/2 and La Dolce Vita - completely didn't get the point and honestly didn't care.
Raging Bull, Taxi Driver and Mean Streets - I think Cape Fear is better than those 3.
2001 - way more of its time than people are willing to admit.
Dr. Strangelove - a comedy by people who were smarter than you and were going to educate you on dumb comedy. Don't think it's funny, just smug.