The first time I heard Strong Songs, it was the episode about "Dancing Queen". It's a song I've heard a babillion times in my life, and was actually kind of sick of it. That episode changed it for me - Kirk reconstructed the song and explained it bit by bit, and after that I just adore the song. That's the thing about Kirk: he has this way of explaining complex music theory concepts in an easy-to-understand way. And his enthusiasm is just addictive.
If you love music at all and want to get behind the songs you love and don't love, listen to this podcast. I get goose bumps in almost every episode.