Simple!
Just answer the poll and feel free to tell us why you chose what you chose.
Poll is public!
For me, it's 1972.
some releases that year :
Deep Purple - Machine Head
Yes - Close to the Edge
Gentle Giant - Octopus
Focus - Focus III
David Bowie - Ziggy Stardust
Jethro Tull - Thick as a Brick
Return to Forever - Return to Forever
.. and more too!