Yeah, I dealt w/ celebs when I was a Disney CM in Guest Services and, honestly, I was never blown away.
I mean, yeah, there's that moment where you're like, "Yes, Clint Eastwood is actually talking to me and asking me about dry cleaning." !?!? or "Yeah, Ray Romano is asking me if I have a band-aid bc his kid has a cut." "Ok, Danny Glover is making me find who delivered his prescription medicine."
Don't get me wrong; it's kinda strange for a moment bc you only see these people on TV / movies. But I was never like OMGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG you're XYZ and slobbering all over them. (nor could you be in my role)
But that's just not me anyways.
ETA: I DO have a funny story where I was at Virgin Megastore at Dwtwn Disney back in the day (20 years ago now) and my bro and I were there and I saw a VIP tour guide and I told my bro that someone famous was in the store. We were looking at CDs and I was walking down the aisle and a man bumped into me, holding a shitload of CDs. He was like, "oh, I'm sorry!" and I was like "oh, no biggie." and I moved on... Only later to be told at the register when I was checking out that GEORGE LUCAS was the one who bumped into me.
I am not a Star Wars fan (sorry, guys!) so I didn't even realize it at the time! So that was the VIP in the store.