No one here knows - really - any of the artists mentioned so far. But I very well know the so called management and industry people that has worked and interviewed them where they have worked for them briefly whenever they are on tour. I know limousine drivers, and FOH sound engineers as well as local promoters, and people that has been on tour with them. Sharon Osbourne excluded. Robben Ford lasted with Miles a year, and he's never ever complained about the actual music, which not even anyone else did. It was just the managament, and organisational deal that was his gripe with it. Numerous people said "no" to Miles too. And people wondered how they could turn that offer down. It's the gig of your life! It's always ONE person inside any band, not a whole band as such (say all of Iron Maiden or something). People like Bruce Dickinson have came across at all times, like the total opposite of a jerk, no matter what Sharon says. Talks and jokes with limousine drivers, behaves nicely towards anyone involved including fans, audience, journalists alike. Now I happen to have heard from the horses mouth from a danish female percussionist who played and toured with Miles for quite some time. She's just a local these days, and plays the occasional regional gig.
And this is the thing with "how much can you put up with, and still go along with it, how much can you swallow".
When first rehearsing with the band, Miles didn't turn up, he has rehearsal directors inside the band. And he said nothing. Complete silence. They rehearsed without him for a few days first. Then he came around. After three days of full rehearsal with him, not even shaking hands with him, to the other new members even, when every song went all right and he seemed satisifed with all things, he turned towards her and the first thing that came out of his mouth towards her was "Do you wanna f*ck?". Complete silence from the others, while she giggled and smiled in an totally stumped way, but she could tell on Miles face that he wasn't joking. He didn't expect her to laugh. No one of the management or other members cared, or did anything about it. It was just the way you had to live with. Be in this environment or bust. Of course, what do you think have happened if she ventilated that officially? Her career would be toast!
I've heard other stories from the road crew as well, and from the horses mouth. And those people who works with different world famous acts all of the time, can very well pick out the hard ones, and the jerk ones, and who's different from the others. The old site, Roadies net had some stories to tell too. Among other things: "No one works for Led Zeppelin or ELO twice". Go figure. But for such acts such as "snotty bastards" as Genesis, they could bend over a few times, and even develop and invent stage things for, to have them use exclusively. The VariLites rotating lights system seems nothing these days, but Genesis funded them with 1 million USD. It was a couple of sound company guys idea. They could've propose this one to ANY of the other bands on tour but decided to go to Genesis first. They saw it, and Phil Collins whispered into his managers ear "give them one million, we need 50 of them for the upcoming tour by october...". The rest is history.
If you're not being a jerk it pays off in the long run!