He had a good innings... 82 years long, and achieved so many things we can only dream of, much less do. Not only was he the first to walk on the moon, he survived over 70 flying missions over Nth Korea during the Korean War, also an amazing feat in itself. Mr Neil Armstrong became a teacher after retiring from NASA in 1971, and served on the boards of several companies [Lear Jet, just to name one], so he was more than a man of action but was a great servant to many throughout his years.
More to the point, Neil Armstrong was a modest and moral man, and when he discovered that people were selling his autographs for large sums of money he stopped signed them to put an end to the profiteering from his name. Good on him for being a man of conscience and conviction.
RIP Mr. Neil Armstrong, your amazing life will be celebrated for centuries to come.