HEard some Nightwish, the others in the list don't sound familiar.
I have a mild hearing problem: I cannot understand lyrics easily. I can
hear them, I just can't process the sounds into words as easily as most people are able to. By contrast, I can pick out individual instruments and so on from a song pretty easily.
This means that I listen to music primarily for the sound, not the lyrics. For this reason I like a lot of pure instrumentals ("Ex Nihilo" from Dark Tranquility is great; "Whoracle" from In Flames; I also listen to lots and lots of original scores from movies and such), and often have no idea what a given song is actually
about. Which is occasionally embarrassing.