McCoy: What's the matter, Jim?
Kirk: What? Oh, nothing. Just so peaceful, uncomplicated. No problems, no command decisions. Just living.
McCoy: Typical human reaction to an idyllic natural setting. In the twentieth century, we referred to it as the Tahiti Syndrome. It's particularly common to over pressured leader types, like starship captains.
Kirk: Ah, Tahiti Syndrome.