If you like early/mid 70's Hard Rock/Metal, then the one album that set the standard was:
On Your Feet Or On Your Knees - Blue Oyster Cult
This was before they went commercial 'Don't Fear The Reaper'.
They had a sound, a drive, and a lot of talent.
Also, this was before computerized editing, fixing live albums by mixing in parts of studio cuts to cover mistakes, etc.
One of the great early Hard Rock/Metal albums - and considered by many their best album.
If you don't have it, get it! Or if you haven't heard it in a long time, hear it again.
After hearing this one, you'll never think of this group the same again.