That's interesting, as I've definitely always been the same way in terms of music vs. lyrics.
I can happily listen to a song an indefinite number of times without ever engaging the "comprehend these lyrics" part of my mind. Though in my case I want to go out karaoke-ing with my wife I can easily enough learn the lyrics (and go "oh, that's what this song was about!") And from time to time a song will have lyrics that are negative enough (or repetitive enough) that a sort of override kicks in and brings the lyrics to my conscious attention, and I can choose to not listen to that song if something about it bugs me.
Strangely enough I'm certainly not left-brain challenged, since I've gotten fairly literate in Japanese in the 20 years since I started studying it. It's just that the part of my mind that listens to the sounds seems to connect in a deeper way than the part that interprets the words. But hey, maybe that helps in learning good pronunciation too!
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