mgiles7, that's yet another good point — the one about genre-specific words. My background is metal (wouldn't guess it to look at me, since I'm an ancient 35 year old who needs to lose about 50 pounds

), and I'm sure that the cover tunes my first band used to play were loaded with catchwords. Let's see: death, black, hell, power, God — I bet all these words are used often. I could spend a bunch of time and actually figure it out, but you get the point.
Was it Duke Ellington who said (and this is not necessarily verbatim) "There's only two kinds of music — good and bad"? While a good lyric might only be presentable within its original genre, perhaps a great lyric is one that can stand on its own merit in other genres. For example, "With a Little Help From My Friends" seems to me to be a great lyric that works equally well for Joe Cocker's bluesy interpretation as it does for Paul's original.
But maybe I'm reaching here. I guess it could be a matter of how talented the performer/arranger is. It just seems to me that, if a lyric is well-situated within the vernacular, it has the potential to reach an audience considerably larger than originally intended. I can't relate to skate music very much; it's not because the lyrics aren't necessarily good, it's just that I'm not part of that culture. There is no element of universality — not sameness, just a feeling of "Yeah, I know what this guy's talking about."
That's why love is such a common theme in song. The trick is taking the universal and manipulating it in such a way as to avoid staleness. Find a facet of the universal gem that hasn't been explored or has been explored only rarely or superficially. Express the feeling or idea without using the label, as in a love song that covers the subject without using "love" fifty times or even once in the lyric.
BTW, I'm not saying I am some sort of expert on how to do this. I'm working on this stuff, too, and this "advice" is as much a reminder to me as it is my form of encouragement to anybody reading who gives a broken rusty damn about songwriting

. I'm just glad we can bounce these ideas/theories around in here, 'cause it gets my creative flow, uh, flowing

.