I actually witnessed Ozzy's first come back gig after Sabbath-1981 at the Glasgow Apollo if I remember right-Randy Rhoads was brilliant but Ozzy was a bit worse for wear.
My lasting memory was approx 3 minutes into the gig (Rhodes first guitar solo of the night)that Ozzy dashed offstage(I could see because I was front row of the circle)and drank from a bottle of spirits (Whiskey/Vodka?both?)like you would a bottle of mineral water-half gone in about three slugs,he was a nervous wreck.
He's funny though,talented with Sabbath,their prototype riffing has been incredibly influential in a positive but sadly in a negative way too as a lot of the cartoon elements of Metal began to surface in the 80's and onwards-something Ozzy has been prone to as well.
Surely one of the funniest men in rock,his stories are legend