For me it was either Black Sabbath or Metallica. Judas priest is up there too. All three bands sound great live, nearly like in the studio. So much energy too, even at older ages.
I'm going back to my Youth.
Janis Joplin at the Original Electric Factory in Philly in Nov, 68'
She was roughly 10' from me............................... JP
P.S.
A few others.
Beck/Bogart/Appice at the Tower.
Procol Harum with Robin Trower on Lead Guitar at the Spectrum.