i must respectfully disagree as i believe that while ozzy's vocals are definitely not normal, they are certainly not terrible. He could be terrible in concert if he was too coked up to sing properly, but I really love his voice when he does it right. I guess I have to admit that a lot of people hate it, and obviously you belong to this group.
I also believe that Solitude is one of the worst Black Sabbath songs. Ozzy's vocals aren't interesting in the slightest, the guitar line is boring, the bass line is mixed too low to hear, and it doesn't do anything, it's just boring the whole time. I don't know what makes this so much different from Planet Caravan, as a lot of the song's elements are the same, but Planet Caravan just does the entire thing so much better.