I'm super hard to impress, don't get star struck, and am not a fan girl. The reason is, I know a simple secret most other people don't realize: no one's as impressive as they seem.
That's not to say people don't do amazing and incredible things, or that they themselves aren't amazing individuals. Of course they are! It's that we're all humans, doing our own thing, excelling where we personally excel. Which also means we're all amazing people capable of doing amazing things.