I used to work in radio and met a LOT of them. Most left no impression, the following did:
Earl Woods (yes, Tiger's daddy. He was amazingly nice and friendly)
The Temptations (we sang with them and they invited us out to their concert)
Lionel Richie (nicest guy EVER!)
Elton John (he and his boyfriend are both my height!! I'm 4'11" tall!

) They were so cute about it!
Prince: He IS my height! His bandmate was my girlfriend's bf. I couldn't believe we looked eye to eye. At the time he was dating a woman who was a foot taller than he was and so was my bf. Cute!
Sean Hannity: He was my co worker for several years and YES, he is the sweetest guy EVER. Yes, I said it!!
and last but not least my former boss,
Marlon Jackson. What a sweet GENUINE person. I'm trying to forgive him for bringing Michael up to the station when I was NOT there!!!