Interesting about music chosen for its significance. I get that, of course, but I personally couldn't imagine wanting to listen to music other than because I love the music. And it's the same with music I don't like. I can't think of a piece of music that I'm put off listening to other than because it just doesn't do it to me.
Actually, I can't stand 'Summertime', but I think that's just because I've heard it too many times; a bit like the blues equivalent of 'The Wild Rover' (for me).

Perhaps genre is a different thing, though? For example, I really like Al Bowlly. Is it mostly because I'm drawn to jazz, to the era, or just to his voice? I'll have to think about this.

And I've already decided to swap the Missa Luba for Fleetwood Mac - Go Your Own Way.