I love opera having had a mother who had old 78s that were played until they wore out. So yes I loved Madame Butterfly when she took me to see it. But I also loved Miss Saigon and thought it a wonderful reinterpretation of the theme bringing it to closer history. Thank goodness I too saw the version with the real helicopter GrannyGravy I was very late to Gilbert and Sullivan, my mother was an 'opera snob' who didn't like 'operetta', but I discovered them and do like some.
I have a huge pile of programs for musicals I've seen, and while I might not always come away singing the songs I can't think of one that I thought a waste of my time or money.
I don't think anyone has mentioned Notre Dame de Paris, which I saw circa 2001 with Danni Minogue, which had one of the most impressive sets I've seen. Or Showboat that did a limited London run with an all American cast years ago. Old Man River was a total showstopper, the first I'd ever encountered! I loved Lion King, was so pleased I had an aisle seat but found there was so much to look at I'm sure I missed some. My all time favourite for songs has to be Jersey Boys which I've seen 4 times. Only surpassed by seeing Frankie Valli and the Four Seasons on his first time on Broadway in 2012. Oh and Sister Act with Whoopi Goldberg as Mother Superior, when she returned after her mother's illness meant she left the show for a while.
I love live theatre, whether it be a play or musical. Don't go nearly as often these days which I regret, I should go to more local productions and not just rely on going into central London. We saw The King and I locally featuring Helen George of Call the Midwife fame, she was a brilliant singer which I wasn't expecting., and it was an excellent production.