I'm not cabin crew but couldn't help responding. Occasionally I do a bit of film and TV extra work and your descriptions of some of these characters matches exactly with what I've seen and heard.
Natalie Imbruglia is really friendly and chatty.
Michael Winner allegedly has someone on set to hold his ash tray, he'll hold out his cigar and the poor s*d has to come running and catch the ash or there's trouble.
Nicole Kidman gets people thrown off set if they look her in the eye and they're important enough to be allowed to do so.
Hugh Grant is down to earth and seems very normal.
Stephen Fry is really chatty and friendly. A real gent.
Jeremy Clarkson seemed completely full of himself and didn't realise he was making himself look a charlie oscar charlie kilo.
Lisa Mafia (I had the misfortune of being in the "Where Are They Now" line-up on Never Mind The Buzzcocks) was a complete
. Fortunately she was borderline z-list even in 2003 and seems to have dropped off the radar completely now. The rest of the Never Mind The Buzzcocks team seemed quite up themselves too and could barely acknowledge the line-up victims in the green room afterwards
I've heard some stories about Michael Caine. Has anyone encountered him?