I have seen many operas and all of Shakespeare plays, every one of which I thought was particularly outstanding, but as a result of my short-term memory loss, I cannot recall all of their content, so I very much enjoy watching them again ... and again.
I have the BBC boxed set of all of the Shakespeare plays, so I can enjoy watching any of them at any time.
All of them are available for streaming to one's home from the New York Metropolitan Opera, some of them from any of several productions recorded in different years.