I'm an historian by trade, so "1776" is one of my favorite musicals, and one that I love to share with others.
Also, my mom and I truly love "The Sound of Music." We can watch it over-and-over without ever getting tired. My favorite song is "Edelweiss," and I always cry at the moment when the Captain motions for the crowd to join in singing and the camera shows Austrians sitting in the stands singing along.
"Singin' in the Rain" has some of my favorite musicals moments. I've watched Donald O'Connor perform "Make Em' Laugh" so many times that one might think it would get old, but
