Don't know if they've been mentioned but buffalo 66 and beautiful girls for me. Along with Festen. My fave film of all time. Dark as f*** is that film.
Another vote for 21 Grams for me. Also City of God and Things To Do In Denver When You're Dead.I walked out of the cinema watching that film. F***** awful. Each to their own though.
GREAT shouts, as is Box Of Moonlight mentioned earlier in the thread.
Festen is a stunning piece of work (and that's coming from a guy who hates the Dogma films).
Another vote for
I saw it on DVD quite recently and it was easily the best film that I have watched over the last year or so.