Mr. And Mrs. Smith
Fun, lots of fun. Brad is sexy, Angelina is unbelievably hot, and the whole movie hints strongly of S&M foreplay of the kind that Ms. Jolie is famous for hinting at, which makes it feel deliciously naughty to watch. There are a plethora of excellent one-liners. Manages to avoid both action movie cliches and romantic comedy cliches despite very clearly being both.
Two thumbs up, for fun in the absence of serious cinematic integrity.