The Marriage of Figaro by Mozart
I love The Magic Flute by Mozart. I saw it last year.
Sorry you won't get anything original from me. Lakme, Aida, Carmen I like them all. Oh and "Annie get your gun" :)
I am not a great opera fan and have only seen 1 Carmina Burana but that was amazing
Phantom of the!
I don't know if that counts as an opera but it is a very entertaining musical and i've seen it about 3 times live in SF
Oh... =/ ok Guys and Dolls!