I have seen:
Professional - Les Mis (7 times), Miss Saigon, Cats, some pantos with the kiddies
Amdram - Les Mis (1 time), Guards! Guards!
Been in: Chess, Grease, Guys and Dolls, and one our music teacher at school wrote called Twistin' Time which was Back to the Future meets Cinderella.
All strictly amateur.
. . . and I'm all like, "I wrote a book, innit," and they're all like, "Well where can we get it," and I'm all like, "Here . . .