The Big Question: Black Sabbath with Ozzy Osbourne or Ronnie James Dio?

I wasn't introduced to Ozzy era Sabbath properly until after I'd discovered the 'Heaven and Hell' album and their second wave with Ronnie James Dio. I then went backwards in a journey of discovery buying everything they had done, and never looked back.

There can be no denying the potency of Sabbath and their influence on the world of rock and metal, but it seems there are two camps, both demanding the right to pronounce either Ozzy or Ronnie the imposter. I don't feel that at all, both eras were incredible and distinctly different.

Black Sabbath - Ozzy Osbourne or Ronnie James Dio?