La Traviata - 2 productions
The complete Ring Cycle
Tristan und Isolde
Tannhauser
Macbeth
Most of Don Carlos
Aida (Some I just listened to.)
Boris Godunov from the Bolshoi
Parsifal
La Faciulla del West
Rigoletto
Maria Stuarda
Boris Godunov from the Met
Madama Butterfly
Elektra
Cavalleria Rusticana
Lohengrin
Hansel and Gretel
A Masked Ball
Les Troyens
Salome
Otello
Die Walkure(Bayreuth)
Prince Igor ( 1 and a half productions Kirov and Met)
Met At Home Gala
https://www.metopera.org/user-information/nightly-met-opera-streams/
Le0nore/Fidelio (Mostly just listened as production so dire) Vienna
I've also watched the musical Jesus Christ Superstar and the play Frankenstein
Some of La Boheme, Die Zauberflote, Der Rosenkavalier The Marriage of Figaro, Die Meistersinger, Faust, The damnation of Faust and the Merry Widow