Oh, Lars... you're so provocative!

I kid Denmark's self-appointed enfant terrible, but in all honesty I look forward to his films more than just about any other director working today. I mean, what can you say about a guy who's first feature-length film out-Tarkovskys even Tarkovsky from a visual standpoint, and then ten years later the very same guy inaugurates the dogme movement? From treating actors like just another element of the mise-en-scene to becoming the director who's style has done more to liberate actors than any other (save perhaps Mike Leigh)? A guy who somehow manages to purchase Carl Dreyer's tuxedo, and then wears it while accepting an award and flipping off the Cannes jury because it's just a technical one? Who kept all of Denmark transfixed with his TV series (likened to the "Who shot JR?" mania in the States)? Who introduced the brilliance of Emily Watson to the world? Who so broke down Bjork that she refused, Falconetti-like, to ever act again... after receiving a Best Actress award for her work at Cannes?
No, there's no one like Von Trier, and he'll make damn sure of that. Is he the greatest filmmaker working today? Probably not. But, arguably, he's the most important. Certainly one of the most visionary. And, at the same time he aims his films straight at the mainstream audience while refusing to pander to their preconceptions and prejudices (but playing on those preconceptions and prejudices for all they're worth). His films are the perfect antidote to the wimpering, faux-transgressive "indie-scene" cinema of today, his cynicism and ascerbic wit a welcome tonic for the pandering, platitudinous conservatism of mainstream movies.
All his films are recommended. Even "Epidemic" and perhaps especially "The Idiots". And "Dogville", "Dancer", "Breaking", "Europa", "Riget"... masterpieces all. <-Not all apprehend this yet, but mark my words. :b