I'm not one of those strict classic-rock guys... I'm always looking for the new and interesting and have my whole life...
But... as I'm relistening to the first two Sabbath records, I'm remembering that these guys were the original everybody!!!
There's not a single great hard rock/ heavy metal band who came after who don't owe almost everything to what Black Sabbath started in the first place in 1970.
It's really amazing... I mean some of the great bands that followed, you totally hear where they got their earliest inspiration from... Rage Against the Machine, Metallica, Alice in Chains, the list goes on and on and on...
I hadn't always realized this, but as I'm listening to these albums I can actually HEAR all the bands I'd thought were really original who came later... Wow.