I'm a vintage Black Sabbath fan, but I'm not a fan of old men continuing to try to make the same rock music they made in their youth (especially front men and other vocalists). As far as I can tell, Ozzy is well past his expiration date. I'm not sure about the others.
"Well, it is one thing for Bill Clinton to say, I feel your pain. It is another thing for Barack Obama to say I feel your pain that I have caused." - George Will