"Being John Malkovich," "American Beauty," "Magnolia," "Election," "The Sixth Sense," "Boy's Don't Cry," "Eyes Wide Shut," "Fight Club," "The Limey," "Three Kings," "The Iron Giant," "Toy Story 2," "Bringing Out the Dead," "The Talented Mr. Ripley," "The Insider," "The Matrix," "Summer of Sam," "Office Space," "South Park," "The Blair Witch Project," "The Dreamlife of Angels," "American Pie," "Bowfinger," "Payback," "Man on The Moon," "Austin Powers The Spy Who Shagged Me," "All About My Mother," "Go," "Rosetta," "The Straight Story," "The Green Mile," "Ghost Dog: Way of the Samurai," "Run Lola Run," "Dick."
EDIT, RogerEbert.com's Susan Wloszczynya and Joblo.com's Christopher Bumbray mentioned on Facebook the year 2007, and, I must agree, it gives 1999 a hell of an argument as an equal and, if not, better contender:
"No Country For Old Men," "There Will Be Blood," "Zodiac," "The Assassination of Jesse James," "4 Months 3 Weeks and 2 Days," "The Lives of Others," "The Diving Bell and the Butterfly," "Ratatouille," "Eastern Promises," "Michael Clayton," "Sweeney Todd," "Before the Devil Knows You're Dead," "Superbad," "American Gangster," "The Darjeeling Limited," "Black Book," "Death Proof," "The Mist," "Knocked Up," "Lust Caution," "Rescue Dawn," "Into the Wild," "The Lookout," "Live Free or Die Hard," "The Simpsons Movie," "Breach," "A Mighty Heart," "Rescue Dawn," "Bug."