My favorite is "Les Miserables". The songs really is so good. I remembered watching it for the first time and I was really so into it for a couple of days. My next favorite is "King and I", although "Phantom of the Opera" is just as good.
I'm sure everyone here has seen "Jesus Christ Superstar" it's one of the liveliest musicals I've seen. The songs are upbeat and the costumes are a sight to see. I've also seen smaller musicals like "Saul of Tarsus" which was quite good too. The later, I watched because it was a production she joined with her colleagues at healthfusion - they were promoting arts at work, so they did this. I hope there are more "official" programs like this, so a lot of people get to appreciate and take part in these kinds of activities. I've joined one once and it was great. An experience of a lifetime even if the show did not make much money of ticket sales, it made some money out of sponsorship.