The Princess Bride (1987)

A fairy tale for people who roll their eyes at fairy tales. It's framed as a grandfather reading a story to a sick grandson who would rather be playing video games, and the boy's grumbling about the kissing parts voices every objection your skeptic might have. Then the sword fights, the giant and the Dread Pirate Roberts win him over anyway, and they usually win over the room too. The tone is affectionate and quick, the lines get quoted for years afterward, and at 98 minutes it's over before anyone thinks about the clock.