I mentioned in the other thread that I'd likely seen all the "great" films but didn't count many of them among my favorites. GWTW... A soap opera. Beautifully done, but a soap opera.
I thought Titanic was OK. On the big screen... Pretty spectacular. However, I haven't seen it since.
Likewise Citizen Kane. Welles was superb, but think I've only sat through the whole thing the one time.
Here's a Wiki article on the "greatest" films:
http://en.wikipedia.org/wiki/List_of_films_considered_the_best Note that the first section includes international films... I admit Ran was among the most visually striking films I've ever seen... It's Kurosawa's take on Shakespeare's King Lear.
The Seven Samurai (done by Sergio Leone as The Magnificent Seven) was very good, and Casablanca stands up very well.
Some interesting lists on the page.
Some other rather odd favorites of mine include The Thin Red Line, (not the more current one, the older version with Jack Warden and Kier Dullea) A little thing called Morituri with Marlon Brando posing as an Austrian ex-pat seconded by British secret service to sink a ship...