Well, I think the most unusual experience of mine in hearing a Paul McCartney song for the first time was when I was 12 years old, and my mother bought my The Beatles' Past Masters 2. I was, and still am, a huge Star Trek fan, and so the *title* Across The Universe appealed to me straight away. But the song itself was disappointing the first time I heard it. Next up was Let It Be, and it had me from the off. To this day it's in my all-time top 5.