As for the Topic of the Day...
-"Mass" - I'm sooo happy that Naxos preserved Marin Alsop's rendition with the Baltimore Symphony Orchestra and forces that I was very fortunate to experience Live at Carnegie Hall a few seasons ago.
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Candide in it's various incarnations and variations.
-"La Bonne Cuisine" song cycle. -Who knew recipes could be so musical?

-"I Hate Music" song cycle.
-"Arias and Barcarolles" song cycle. I had a chance to play one of the piano parts (it's a duet accompaniment) with an opera company in DC many years ago. Challenging and moving.
-Some of the "Anniversaries" - Bernstein wrote various "tribute" pieces to various people (friends, composers, etc.) It's interesting to see how he interpreted them through his music.
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Trouble in Tahiti - The whole
"There is a garden..." sequence destroys me every time. -And then I get picked up again by
"What a movie!".