So many films I could mention, it depends on my mood, on whether I want to be entertained or educated, or both.
I recently saw Melancholia, a Lars von Trier film, the opening sequence alone is just beautiful. It's kind of a disaster movie (which appeals to my love of 70's disaster movies Rion Mather) about a meteor heading towards earth. Have a look at the opening on youtube as I can't even begin to describe it.
Another film I saw recently for the first time was Apocalypto, the Mel Gibson film about the Mayans.
Apart from those I love old Hitchcock films, David Lynch. Not a great fan of Woody Allen, apart from Vicky Christina Barcelona.