At the time, my friends and I were thinking Paranoid was the perfect heavy rock album. Although, by the late seventies, I probably preferred the first album. The others were patchy. Sabotage was amazing, but, initially, was only available as an import for some strange reason. Never Say Die and Technical Ecstasy were major disappointments, but Sabbath redeemed themselves with Heaven and Hell. Iommi and Butler did seem symbiotic at times.
I remember Gillan hosting a radio show and announcing that he was a 'paid-up member' of Black Sabbath. Xero the Hero had some radio play and seemed pretty good. The Reading festival performance seemed a bit odd with good live versions of the Born Again tracks, but Iommi playing the Smoke on the Water riff and Gillan singing, "Finished with my woman 'cause she couldn't help me with my mind . . " It would have been interesting if Iommi and Gillan could have weathered the storm and made at least one more album together.
Despite amazing singers in Ian Gillan, Ray Gillen and Glenn Hughes, Black Sabbath did not release another great album until Tyr with Tony Martin. Apparently Cozy Powell ensured Martin's place in the band.