My desert-island cast album is "Red," by Taylor Swift. This isn't actually a cast album--it isn't paired with a musical--but, then, wait. "Red" is sneaky; it does work as a musical. When she met Jake Gyllenhaal, Taylor met the nemesis of a lifetime; I'd argue no one else, in Ms. Swift's vast galaxy of characters, seems quite as interesting. Gyllenhaal is the Joker, or Lex Luthor. Yes--the Penguin is out there, as well--but no one can really compete with the Joker. Who wants to hear about love? We're all here to get the details on the breakup. Young Taylor Swift knew this instinctively; she wastes very little time on the happy period. We move very quickly toward the pain. Take "All Too Well," Taylor's most celebrated number, and a kind of thesis statement for the album. The very first line: "I walked through the door with you; the air was cold; but something about it felt like home somehow...." THE AIR IS A...