^ Oh man, to be young enough for this to still matter again
What I've noticed over the years is that workplace attitude, especially towards intangible elements of the workplace like authority figures and the corporate structure are the new telltale signs for stylistic preference.
If I'm in a meeting with a manager who keeps trying to make witty one-liners it's pretty well guaranteed they're into hip-hop (particularly mainstream fare like Eminem or Kanye). A manager who'll just bit their tongue, then complain about the corporate machine while doling out tasks on a new project - likely a metal head outside the office. Someone who's always perky and farting sunshine and waving their hands highest and hardest at the opportunity to volunteer for a corporate event - top40 pop tart.