What shows' opening credits do you never skip, even though they're the same every time?

I don't mean Game of Thrones or Battlestar Galactica, where the beginning titles change from episode to episode. I mean just a classic title sequence that so perfectly sets up the show's mood and style, you watch it again every single time.

For me, the original Batman animated series title sequence is just perfection. The music, the pacing, the action, the suspense. I just love it too much to skip.

What show is it, and why do you love the intro? (Also, link to a video of the credits, so we can all enjoy.)