Brad Pitt. Though I never list this guy among my favorites, he really is and I should start doing that. I claimed for years now that this is a man whose 90% of films are fantastic. He is almost never wrong when choosing films and even if he is (The Mexican, Mr. and Mrs. Smith, Troy) he always gives 100% of his talent.
He is one of those actors who do both well in drama and comedy. He was mesmerizing in last year's Moneyball, fascinating in The Assassination of Jesse James by the Coward Robert Ford and heartbreaking in Babel. But it's his comedy efforts that are the closest to my heart - from Mickey through compulsively eating Rusty to Chad, Pitt never ever failed to make me laugh.