It was the 60s, and I was, I think, 6 years old. Maybe 7. Anyway, Man From Uncle was one of those shows I could watch with my parents. Some years later, when I was maybe 11 or 12, I saw him live at a theater - I think it was in Sleuth. My girl crush was still fully activated.
And now, when I see him as Ducky as NCIS, I still get that old familiar girl crush - until I remember reading that he's in his 70s and thinking, "Oh, wow, too old for my taste," and then reading that his wife is slightly younger than I am. Sigh.
Funniest NCIS moment: "What was Ducky like when he was young?" "Ilya Kuryakin."