I saw Ozzy live exactly once. It was the summer of 1989, live at Arco. White Lion (with the amazing Vito Bratta) and Vixen (who I pretty much blew off except for their hit by walking the causeway chatting with friends and smoking reds because I was 14 and stupid) opened.
It was a great show. How I prefer to remember him compared to him reading from prompters. I am glad he got to have his friends give him such a great sendoff but I thought seeing him performing from a chair was incredibly sad and depressing.
Ozzy always introduced us to great guitarists. Randy Rhoads (RIP) chief among them. Absolutely my favorite guitarist ever, yes, even over Johnny Thunders, Steve Jones, Billy Zoom, Brian Setzer and all those cats. He had Zakk Wylde with him at that time. Zakk in 89 was much different than the biker dude we have today, very much a Randy clone of sorts, though he still did way too many pinch harmonics and nobody plays like Randy (sorry, it's just truth). I think that is what I will appreciate Ozzy for the most. Hell, Iron Man was the very first song I learned on guitar!
RIP Prince.