I'm SLF not crew so hope you don't mind me commenting...
The most enjoyable flight I've ever had was in Feb this year on BD GLA-LHR when Robbie Coltrane sat himself next to me, well next but one (thank you DC Gold seat block). He's an absolute gem of a guy, we laughed and joked all the way from the moment he sat down to us walking towards arrivals in LHR. Very open, totally genuine, down to earth and incredibly funny.
At the opposite end of the scale, Robert Carlisle. As grumpy and he is short.