I'm a Sabbath fan. I saw them in concert in Honolulu in 1980 with Ronnie James Dio on vocals. I like them both with Ozzie and with Dio on vocals, though they had a different sound depending on who it was. Tommy Iommi is an inspiration. He accidentally chopped off the ends of some of his fingers on his right hand when he was a kid, the ones he would finger the guitar strings with since he's left handed. He made prosthetic fingertips and tuned the guitar lower to make the strings more stretchy so he could play, which worked with the Sabbath sound. It's a great story of overcoming life's obstacles. His other option would have been to re-learn guitar right handed. That would have been really hard, though I'm sure the way he solved it was hard too.