I am a casual music person. I am picky about what I listen to, but not because I have a clue about music or have refined tastes or anything. I just like what I like. Mostly, though, I use my iPod for audiobooks and don't listen to music all that often.
“There are two novels that can change a bookish fourteen-year old’s life: The Lord of the Rings and Atlas Shrugged. One is a childish fantasy that often engenders a lifelong obsession with its unbelievable heroes, leading to an emotionally stunted, socially crippled adulthood, unable to deal with the real world. The other, of course, involves orcs.” ~ John Rogers
I also test highest on musical intelligence. I played piano and guitar and sang in choirs growing up, used to sing constantly even as a very young child, have spent countless hours listening to music of all kinds all my life -- yes, it's the one thing that remains constant, and I'm not sure how well I'd function without it.
Not in the sense the OP is asking. I don't explore the darkest realms for new musical experiences, I don't go out of my way. But I'm always up for hearing something new.
However, one thing I've never personally liked is the idea of "background music" as being the only use for music. When I "listen to music," it's my main focus, not a background. If I'm doing something that causes the music to slip into the background, I turn it off / change to something different. Still, background music has its place--it's just that using it that way shows, to me, less respect than Active Listening.