My mind seldom gets enough rest to be creative and write stuff -- but I do enjoy poetry and writing lyrics.
I'm heavy into singing, though. I sing in the choir every Sunday (though the choir is only 3 people now plus an organist. My voice is the only young one, and by far the loudest!)
I think when it comes to music, you should just avoid glorifying anything shameful, and try to create pieces with objective beauty.
I like all kids of *real* music. It has to have a coherent (catchy) melody and/or harmony, and some kind of substance as far as lyrics go. The lyrics don't necessarily have to make sense -- they can be cryptic or strange -- as long as the rest of the song is good.
My taste is very eclectic. Besides Chant and Catholic hymns, I also like country, folk music (e.g., Irish), some classical, some good pop music (mostly from the 90's), some Japanese pop (again, mostly from 90's) -- plus a few things here or there. I rather like the sound of certain Ska songs (I guess I like horns, and the fact that much Ska music is upbeat). I just like music that sounds good.
I agree with Vladimir -- anything universally true will resonate with the greatest number of listeners.