I'm a latecomer to owning Pink Floyd albums (first "Atom Heart Mother" and "Saucerful of Secrets," then after I started collecting vinyl again, "Wish You Were Here." Someone must've loaned me Ummagumma because I listened to it a lot.

My Dark Side of the Moon memory: One of my more eccentric high school classmates ended up enlisting in order to avoid going to Vietnam, and he wound up stationed in Germany, where he was exposed to a druggy / boozy lifestyle far more advanced than what we grew up with in our little south Georgia hometown. With access to military commissaries, he amassed a redoubtable stereo system: An AR turntable, AR amplifier, and Bose 901 speakers. And the album he chose for us to hear in his bedroom in Mystic (that's the actual name of the settlement--the name shows up in a Harry Crews novel, btw), Georgia: Dark Side of the Moon.

The music and the quality of reproduction were like a window on a universe we had never heard before.

I haven't bought DSOTM (though I've auditioned it a bit on streaming) because nothing can compare with that initial shock of the real.