Feel free to consider me a Philistine (*). Mozart's Requiem - OK, but then again, it was forced on me when I was away age 8/9 at boarding school and there was no avoiding it, being an important 'for the parents' thing with months of rehearsals, and there were other pieces done in collaboration with the Masonic School for Girls, so they had to be 'perfect' as it would not just be letting our school down, but the 'sister' school, too.
I switch all opera off - even when they play 30 seconds in some quiz show I switch off. Just awful noise, to me. Happy to listen to (instrumental) Mozart to Madonna, Bach to Bowie, but add voices and "classical" gets switched off.
Age 50+ but under 55 :) (and listen to 6 Music, 1 Xtra, electronic, new age, smooth jazz, dubstep, drum'n'bass, etc, etc, etc, but not Country, must admit!)
(*) Although I've been in the San Francisco Museum of Modern Art and galleries in Chicago (free entry days), history, art, opera, and even 'classic literature' are generally areas where I don't tread. Computers, music, technology / gadgets, and warfare (OK, about 60 years of history) are of interest.