This is very good thread, maybe the idea is that we keep putting up ideas, and if one person doesn't like it, then it can't qualify as a film everyone likes.
So far, no one has shot down The Wizard of Oz, and I'd like to add Gone with the Wind.
On a completely superficial level I'd like to add to the debate Pretty Woman (but I won;t be surprised if it gets bashed very soon...).
I don't know how many times I've seen it, but I always watch it if its on telly. A feel good film.
On the films that no one likes, I think that would be even more difficult to pin down.
My pet hates are the Matrix, Lost in translation, Forrest Gump.