My pick would probably have to be The Piano. With great performances by Keitel, Hunter, and Neill, a haunting score by Michael Nyman, and fantastic use of color in the cinematography, this is one of my favorite films of all time. Playing Nyman's pieces on the piano is quite difficult but very enjoyable.

I think I've voiced my opinion on Dazed and Confused before. I viewed it at the exact right time in my life and it's always stuck with me. It's sort of a time capsule of the 70s, but at the same time is eternal in its themes.