yeah I know you did not ask!
I think I figured out why so many folks tend to dislike classical music. Think back to the last time you were on hold. What was the music? In my experience it is usually classical, followed by what we used to call Muzak, or on rare occasions easy listening. The combination of being on hold for far too long listening to unfamiliar music may generate this dislike .
Just for the record classical music is one of my favorite genres, but I still hate being on hold!