I don't have much to contribute but may be of interest to some!
My friend works in tv production, warwick davis is lovely as is his wife.
Met niall from one direction at a party who was also very sweet and happy to pose for pictures.
The towie lot were generally drama free which surprised me. Chloe sims being one of the friendliest to the crew.
Gemma Collins had little regard for time keeping and would complain about having to work outside. Was apparently told off by producers for moaning about a 5 minute scene when the crew had been there all day working hard, including a heavily pregnant staff member.
I have met very few celebs! Stephen mulhern and holly Willoughby I met when I was about 14 when they were filming MOM. Very kind to me when I was pestering and fan girling, made conversation and gave hugs!
Lydia bright very rude when I saw her at V festival once. I said hello and she gave me the dirtiest look and turned away.
Met Arg in a club and he motorboated my friend, very friendly none the less
That's all I've got I think!