1. I have noticed that there is a certain "Wall of China" effect with music appreciation, this huge thing that prevents you from appreciating music of all styles unless you've devoted a lot of years of your life listening to it and loving it intently. When I was a kiddie listening to pop/rock stuff, I never thought I'd be able to appreciate Stockhausen or Xenakis or the usual suspects of 20th century music.
However, I loved music (and still do, obviously) and I started getting into the more obscure stuff day by day. I was not satisfied with what I'd been listening, I wanted more excitement. I finally reached a stage where I jumped over that huge Wall and started loving almost anything that made sound. I enjoy the frequencies, the interplay (or lack of interplay) in instruments/voices/sounds, the reverb, anything really. So I think it's not a matter of formal education per se, but of self-accomplished cultivation of the love of both sound and music.
Play me anything nowadays and I'll find something to appreciate in it.
2. Have you noticed that the more rule-based and mechanical music is (twelve-tone, total serialism) the less it sounds like music, especially to casual music listeners?