You've got some cool vinyl bargains there Sir Flopps. It's quite exciting to discover that one enjoys a whole new genre of music at any point in life. It happened to me a couple of decades ago, when I discovered that certain classical pieces could send tingles along my spine.
My theory fwiw, is that it's human to become conditioned, by our parents, peers, friends, etc. Quick example: when I was growing up, my mother used to tell me that I wouldn't like curry. Why not? The answer was because she didn't like it - or thought she didn't. In fact, she had never sampled any, but casting an eye into the fragrant pan which my curry-loving father would occasionally concoct, her lips would be set firm, head shaken, and she would mutter darkly that it would probably make me ill. (Of course, at some point in my teens, I DID throw caution to the winds and tried it... I've regularly cooked and eaten curry ever since!) Lol
I guess something similar happens with music. Whilst I, like everyone else in my class at school was enjoying and raving over pop-groups of the day, one particular girl raved about classical music. Was she merely trying to stand out from the crowd? Did she want to be noticed by the sarcastic old bat who taught music...? Probably not. I think she genuinely enjoyed the music for its own sake, but at the time it made her seem a tad more "highbrow" than the rest of us.
Your category (d) "Finally opening a locked door and embracing a hitherto ignored genre to almost totally apreciate it." is the option I'd tick. As for "popularist titles" imho they shouldn't be eschewed simply because they are relatively easy to enjoy and appreciate.
Do you remember when Radio "Classic FM" first hit the airwaves? Jeepers, so much criticism from the purist Radio 3 listeners. But what is wrong with having a station which plays the "popular" classics? It's a pretty good way of finding out what you like/dislike, and can lead to a bit more musical exploration.
In our CD cabinets Muse and Queen rub shoulders with Mozart and JS Bach, Billy Joel and The Stranglers, share a shelf with a Bizet opera (
"The Pearl Fishers" - a version sung in English, btw, so easier to follow the plot!)
Snap! I so agree with Becky, in fact, I'm eagerly awaiting delivery of
"Grieg: Peer Gynt Suites" which I ordered recently.
Life without music would be, well, pretty hard to imagine.