I have never really "got" Dark side of the moon, it was good but not great IMHO the early Floyd when Syd Barrett was firing on all cylinders was by far their best period. "See Emily Play" and "Arnold Layne" were so good they made the hairs on the back of your neck stand up.
There was a lot of great music around in those days some of the more obscure stuff is what I recall with the greatest pleasure, e.g. Blossom Toes: "If only for a moment" and "We are ever so clean" The Sensational Alex Harvey Band: "Next" (Best track and all time best rock anthem:"The Faith Healer"),"The Impossible Dream" and "Tomorrow Belongs to me" Haphash and the Coloured Coat: "Western Flyer" (Best track: "The Wall") Barclay James Harvest:"Early Morning Onwards" (Best track: "After the day")and "Gone to Earth" (Best track: "Poor Man's Moody Blues" - this was written to show the Moody Blues how good "Nights in White Satin" could have been.
Sometimes, it's the moment or event that makes something great. I recall (just about) many sessions with friends listening to that, and others.
I can't tell you how many copies of DSOTM I got through. Digital seems to have solved that problem of wear, although I still do have my very first copy in storage.
There are so many tracks and albums I class as memorable, or great, for many reasons. I'll name a couple in the same era, but by no means anywhere near the many tracks and bands I like: Deep Purple, "Smoke on the Water", or The Who, "Baba O'Riley," are high on my list.
No one has mentioned 'Dire Straits' or the 'Pink Fairies', or Rod Stewart. Come to think of it nor Rolling Stones or the Electric Light Orchestra. Nor Emerson Lake and Palmer. Tubulla Bells by Mike Oldfield ( released 1973 ) is 40 years as well. I have a very long story about a bootleg tape made in Chesterfield by an ex-roommate but due to adult content I will keep it to myself as a fond, but confused, memory
1973 is a weird year to home in on. It's close to the cusp between the early 70's, which were an extension of the '60's --this is only fair, since the Sixties didn't really start until 1964 or so-- and the later '70's, which were a whole nother ballgame. Bit of a cultural wasteland in between. (Don't try to argue that you can come up with significant song titles for every year of the decade, including 1974. I mean, you could name interesting and important people who came from Nebraska, but... Oh, never mind.)
:: detour to YouTube ::
Ooh, nice. Who's on harmonica? I ought to know, but I don't have quite as many brain cells as I did 40 years ago :(
Yes it is, that's one of my favorite live tunes. I love the parts where they are playing the harmonica, guitar and drums off each other. That was recorded when it was considered they were at the very best.
Look up Whole Lotta Love on youtube, it's 23 minutes because it includes covers of other songs in between the start and ending of Whole Lotta Love.