The actual lunar spacesuits with traces of moondust still on them give me the chills. And how they're presented in such a dark, quiet case -- you really do feel like you're looking through to watch astronauts walking on the moon.
I think there's a very good chance that John Glenn was the first astronaut whose name I ever learned. So getting to hear him speak was an exceedingly memorable moment.
Okay, so now on to what I came for in the first place -- the meteorites! Touchable meteorites always get me excited, because those hunks of stone and iron are the oldest things it's possible to touch -- the ancient leftovers of the formation of our solar system.
Between the 11 hours on my first weekend, various visits after work, and coming after-hours to see the Glenn lecture, the National Air and Space Museum now felt like familiar territory.