I do really enjoy Mad Men's title sequence; it graphics and the music perfectly reflect the cool-jazz era that the show is set in, and the silhouette free falling past buildings covered in advertisements is a great symbol of the show's themes. It's a near-perfect sequence.
Mad Men Title Sequence from Caleb Woods on Vimeo.
Of course, I said near-perfect. In my mind, no show has crafted a better title sequence than Dexter. Of course, we know that Dexter is secretly a serial killer, and with that knowledge the show cleverly gives us the most sinister morning routine ever, even though it is completely harmless. It's two minutes of brilliantly dark perfection.