Bill Simmons thinks it's Almost Famous. The Times of London has Hidden (I've never heard of it either). Some site points to Kill Bill. This pop culture site Complex.com has (shocker) Anchorman. And leave it to a Chronicle writer to say The New World (I dunno, maybe I don't get Malick enough, I didn't like Thin Red Line either. I need to rewatch these).
There's no easy answer to this. So offer your opinion. What's the movie of the decade?
For me, I'll go with City of God (Memento's a close 2nd). 1) I'm a sucker for epics, and make no mistake, this is an epic, 2) it has some of the most kinetic and slickest editing of any film, as everything moves briskly by with almost a documentary-type feel, except documentaries aren't this whack, 3) it very much captures the poverty of the Brazilian favelas and the culture surrounding them (most of the actors were actually recruited from favelas), 4) Lil Ze is one of the best movie villains ever, right up there with Heath Ledger's Joker in the top ones for the decade, and 5) "You've just killed the coolest guy in the City of God." Of all the top movies mentioned, it's the most rewatchable too, except for Anchorman.