I pay very little attention myself. I don't care very much about the lyrical content (as long as it's not ridiculously bad), and often don't make even a subconscious effort to understand what's being sung. In fact I sort of prefer listening to music with unintelligible vocals, or in a different language or whatever, because the vocals just become that much more intertwined with the other instruments to create a whole image.
While I may find some lyrics interesting in retrospect, they generally have no influence whatsoever on what music I listen to. I listen to music for the music. That said, it seems like I'm in the minority. Most people I talk to put great importance on lyrical content. I never really got that; why not just read poetry if that's the sort of thing you're into? But to each their own.
I've been wondering if this relates to type or certain processes, hence this poll.