Movies that BLOW YOUR MIND when someone says they don't like them

I wouldn't say blows my mind, but I never understood all the hate for those Batman movies from the 90's. Maybe if I watched them now with adult eyes it would be different, but I loved them as a kid.

" The Dark Knight. I only ever met one person that didn't like it, and I still can't really comprehend why.   Also, anyone that doesn't like the original Star Wars movies.  "

Aliens. Even original Alien.

Someone once told me they hated Fight Club. I felt like punching them in the face...

I was blown away when someone told me that they hated Gran Torino. 
That movie is one I'll make my gran kids watch when I'm old and can't control my bowels. 
 
EDIT: Once they've reached a respectable age that is.

" @ThePhantomnaut: Alien>>>>>>>>>>>>>>>>>>>>>>>>Aliens. I'm sorry. I just don't get the mass appeal that Aliens has.

Fight Club, Se7en, The good Star Wars movies, The Boondock Saints, Pulp Fiction, The Shawshank Redemption. 
 
I'd say American History X, but it's mostly that most people I ask haven't seen it, versus not liking it.

All dogs go to heaven