Sometimes I think it can just depend on the day, and the situation they were in - for example, if it was for promotional purposes, they would be stupid to be rude to fans
Anyway, I used to work in the music industry and worked with many "celebs" - some were pretty Z list.
Peter Andre - during his height of fame in the 90's, rude, arrogant, just horrible to be around, but then during IACGMOH and beyond, he had grown up a lot and turned "nice" - became so genuine, I like him a lot now
Shirley Manson, Garbage singer - so so lovely, offered me a drink. Her band was massive in the late 90's/early 00's yet she still had time to chat and be polite
Bjork- a nightmare. Nuff said
Simon Le Bon- arrogant, thought the world owed him a favour
Barry from Eastenders - ha ha, I did say Z list didn't I. Well, he was ok, but thought he was a bigger star than he was
James (the band) - most of them were nice, but a couple were just awful, really rude, and expected me to just produce drinks on tap
JK and Joel - when they were working in regional radio, a pair of sweeties, tiny though in real life, as were Ant and Dec who I met when they were just PJ and Duncan!! Lovely, quiet, shy little boys, so sweet! I dont think they have changed that much
Jamelia - also a lovely, down to earth lady
Jenny Frost (when she was in Precious, pre Atomic Kitten) - nice enough girl, but desperate for fame
Rita Simons - when she was in a pop band, before playing Roxy - a bit offhand, not particularly friendly
Scooch - lol. All lovely bar the girl with brown hair, thought she was better than she was.....
Howard from Take That was of course my highlight lol - didnt ever speak to him but he was DJing somewhere, he is SO hot, and very tall!
Plenty of others, but I cannt think of them to hand as these are the ones I remember more prominently