Well I'll add my bit here.
Ferris Bueller's Day Off <-just have to love it, I own the video, and sometimes, when I'm a bit blue and want a cheap laugh, well,
Leisure Rules!
Fiddler on the Roof <- classic, can't get away from it, there are some darn funny parts, and the music is wonderful!
The Straight Story < Fantastic little movie staring the late great Richard Farnsworth
Brazil <- Possibly Terry Gilliam's best movie, not for everyone, you HAVE TO see the directors cut.
Blade Runner <- ground breaking, great storyline, great visuals, again, Directors cut is the only way to go!
The Seven Samurai <- My favorite Kurosawa movie, totally driven by the story and the characters. The Western re-make "The Magnificent Seven" is, at best a poor copy.
The Princess Bride <- laugh out loud funny, lots of twists, and sword fights, bonus is you can watch this one with the whole family!
The Grapes of Wrath <- if you have not seen it, rent it and see it, if you have not read the book, read it.
The Searchers <- One of my favorite John Wayne movies, and that is saying a lot, and it is a John Ford film too!
The Terminator <- Yep, love this original one, the 2nd and 3rd ones are more SFX driven, and less story line. I love the original, Arnie did a great job, and the story is so good. GREAT "B" movie!
I'll stop there, I could fill pages
Cheers!