Before Sunrise
Maybe I see myself a little too much in Jesse. The unremarkable, cynical, American traveling by himself in Europe, who can't speak anything but English, looking to "find himself."
But the hyper-realism of the all too familiar "beginning of something" conversations won me over. You don't need a big budget or a surprising plot to make a good movie. You just need to tell a story with actors who make the audience care.