Too many to count.....
At the top of the list:
The birth of my son, and the birth of my daughter were both amazing, beautiful fantastic moments. I don't play favourites between them, but midwifing(husbanding?) at my daughters home-water-birth, that was special ^.^
My first performance doing stand-up comedy, even though it was terrible... ( I keep a video of it on youtube to remind me ), or perhaps my first Edinburgh festival fringe gig?
My first performance as the Fabulous "Mistress Sinestra"