Oh my gosh, this is a delightful thread!
My first Broadway show was May or June of 1998. The commercial transfer of Roundabout's 1776 revival. Gershwin Theatre. I was in 5th grade, I remember sitting separate from my classmates, with my mother, down at the front of the house. I, sadly, can't remember much of the show itself -- but, that curtain call? Oh, my. My mother turned to me and said, "Michael, look." and I made eye contact with Michael McCormack (John Adams), smiling down at me. I'll never forget that moment.
(My first straight play was TALK RAD!O. Wednesday, March 7, 2007. Front row center for the matinee at the Longacre. It was absolutely, positively thrilling!)