I've been asked if I would take a one way ticket to the moon or mars, and the answer would be an unequivocal yes.
The spirit of exploration, and finding and doing something that no one has done or found before is at the very core of what being a human is. If we lose that, we might as well go extinct as a species. There's a reason the Dark Ages are named as such. Neil Armstrong was just one man who got to do what he did on the backs of millions of people, scientists, engineers, politicians and others. But he represented the antithesis of the dark ages. We went to the moon for many reasons (most of which were not 'pure' exploration reasons), but nonetheless he represented everything that is great about human progress, pushing the limits, and being setting the standard for everyone to aspire to. I know so many people who went into science and engineering (even the biological sciences) because of what they saw on that day.
Neil, because of you, and others like you, the whole world collectively experienced the most important emotion that exists, a sense of awe and wonder. For as long as humankind exists, your name will be spoken of in the highest regard. Schoolchildren will learn it for as long as schools exist, and they will dream to be the next Neil Armstrong. Thank you for that hope, for providing us an ideal that all of us aspire to.
I am actually a little bit emotional right now, which I find very odd because even when someone like Arthur C Clarke (my favorite author) or Carl Sagan (though I was young) I never felt emotional (though I did feel sad).
Rest in Peace. I hope we as a species can live up to your legacy.