I could go on forever about this topic too...
My favorite is a somewhat obscure show called Runaways, not many people have heard of it. I had the pleasure of student directing my High School's version of it (it one the State Thespian competition
) along with Your a Good Man Charlie Brown. I can't sing so I directed the musicals and acted in the "straight" plays
After that I would have to say
Tommy
A Chorus Line
Miss Saigon
I am not very into Andrew Lloyd Webber even though I have seen many of his shows.