I've had some very similar stories to people here. The most disappointing for me was dylan, I seen him about 15/16 years ago, The Never Ending tour I think it was called. He couldn't of given less of a fuck, came out dressed in black shirt an a cowboy hat, the band dressed the same. He proceeds to get on a keyboard while the band form a semi circle in front of him essentially shielding him from view of the audience.
Closed with Rolling Stone, fuck me I've heard drunks in kebab shops do a better job. Sounded like he swallowed a bottle of bleach and razor blades.
Saw Van Morrison shortly after that, he was unbelievable incredible blues gig. I went to see him again after it, you swore the whole audience had rode his wife he was fucking hateful. Genuinely was spiteful towards the audience!!!
Can echo what others have said about the chilli peppers the most inconsistent band I've ever seen either shite or brilliant with no middle ground.