I always try to make a point of figuring out the lyrics to the songs I listen to. Sometimes it proves to be particularly rewarding, sometimes it turns out to be crap.
Case in point, sitting down and reading the lyrics to bands like Faith No More, Pantera or Meshuggah can be extremely interesting. Reading the lyrics to a band like Strapping Young Lad or (for the love of God) Krokus can be a nauseating experience.