Of all celebs I have met, the one I remember most fondly was probably Robert Plant (Led Zeppelin). He was incredibly humble to his crew members, and incredibly nice to the people working at the event his band was playing (his solo tour, not the zeps) - He took time to say hi to anyone in the room, from the young kids running errands to the stage managers and the people in other bands playing that festival. Made a great impression on me to see an absolute legend being so humble and approachable.

The guys in Red Hot Chili Peppers and Muse were also incredibly nice people. Iggy Pop is one of the smartest people alive and a super classy dude. Steven Tyler was fun and also really nice to work with - these are a few that stand out.