TOD:
Hard to pick just a few. I have enjoyed reading the recollections of fellow DRs.
I have been enraptured at many a choral concert. I remember a concert at Carnegie Hall in NYC, probably during the 1970s, where a Soviet choir performed. I remember being enraptured by the singing, but there were also large bodyguards at the foot of the stage, arms crossed, facing out into the audience. I assumed they were there to deter any of the performers thinking of defecting.
I sang with a choir in Carnegie Hall and the Kennedy Center - those images are certainly burned into my brain!
I saw a Bach specialist conduct the B minor mass, in its entirety, from memory. That was impressive.
I will never forget my first encounters in the concert hall with the Duruflé Requiem and the Britten War Requiem. Both sublimely beautiful and ineffably moving scores.