For me, The Wall or Darkside of the Moon (yes, this thread was inspired by the Roger Waters interview). I can't even describe my feelings about those albums without getting chills. This Stern interview rectified a myth that I believed - that the wall was NOT about his dad, but about another WWII soldier. Learning that it was about his dad, solidifies The Wall as the greatest album ever. I first watched the movie at 16 yrs old, and I still cry at 40 when the kid puts the dad's uniform on. Fucking heartbreaking.