"Proust" introduced me to Saint-Saens' Third Symphony and Debussy's Dances for Harp and Orchestra, for which I'm profoundly grateful. I was also bowled over by the music of "Sylvia", which I'd never heard before as the ballet is so infrequently revived.
I would probably not have read "Eugene Onegin" had it not been for the poem's ballet and operatic versions.
Slightly OT, but I'm fascinated by the process of adapting long, complicated novels and plays into operas/ballets. "The Winter's Tale" is one of my favourite plays and I loved Christopher Wheeldon's version for the RB, but I must admit to missing the character of Autolycus!
Janet, I've just booked for NB's "1984" at Leeds and can't wait to see how they'll handle the story.