There's an inside/outside dichotomy that I run into occasionally when dealing on a professional basis with Names, or famous people, or personal idols. I'm good at treating the interaction normally, at treating People like people - that's not it. It's at other times when I suddenly slip sideways into fangirl space, mentally, and think holy crap, I'm working with Name! or something similar. It happened more than once while I worked on Vikingcon; I expect it to happen again with IROSF.
In some ways it's good. It keeps the hubris down, for one thing, or at least trims it back a bit.