I think what you've hit on is key here.
You grew up in a place that had an availability of silence.
Your MIND developed with the ability to function in the presence of it, and when you need to concentrate, you return to it.
City mouse/Country mouse. Ask one of your friends who needs music to function where they grew up.
I find that the music (or silence) I need is very closely dependent on the language I'm working in.
I've also found that the music tends to be similar to what I was listening to when I learned the language.
My typical mix is video game music, jazz, rock, etc... but across the board, no English lyrics.
And nothing that sounds like grinding metal (too many remixes love that sound >_).