Best:
1) Def Leppard's Hysteria concert at Wembley Arena, maybe 5 years ago? They didn't sound like a bunch of retirement age grandads at all. They were active, lively, and Elliot's voice was in top form. I can't imagine they'd have sounded any better back in the 1980s.
2) Bon Jovi put on a top, pro show at Ellis Park in the early 1990s too. I've never been a big fan of them but full credit to them, they made sure the audience got a top class performance for their money.
3) Within Temptation at Wembley Arena. Some time in the 2010s. Very moving live performance, the band were super tight and the vocals were soul stirring. I thought they really did translate well to a live performance.
Worst performances:
1) Whitesnake at Wembley Arena, maybe 2015. The sound was awful. David Coverdale's voice was shot. And the only reason I realised it was Tommy Aldridge on drums is because he played just about the exact same drum solo that he did in 1981/2 on Ozzy Osbourne's live album "Tribute", just after Ozzy says "Ladies and gentlemen, Mr Tommy Aldridge on drums."
2) The Cranberries, north Johannesburg in the late 1990s. I think the venue was called the Mnet arena or something. The performance wasn't really bad, it was just... tepid. Dolores choked the notes on her guitar riff in Zombie, too. Impressive to see two Parker Flys on stage at the same time, though.
3) Lenny Kravitz, Ellis Park. Late 1990s. I walked out at what felt like 30 minutes into a saxophone solo. Earlier on, The Cult had rocked the place. So the concert on the whole wasn't bad, just Lenny.