A friend of mine, who was somewhat dismissive of the group initially, has been slowly getting into a lot of their mid and late-60's work recently. He's a sucker for complex chord progressions, so one day I played a couple samples from "God Only Knows" and "Surf's Up" in passing...a funny Brian or Dennis story later, and I had him hooked. 

(Hi. New guy here. This seemed like a good thread to start with.)

I'm going with 1:41-2:14 of "Good Vibrations," right after the second chorus. Can't help but air-sleighbell there.