OMG, I didn't even realize until now that there was a whole thread devoted to metal!
That makes me think maybe I should start threads about my favorite kind(s) of music...but then they probably wouldn't fit in this section.
I mean, my absolute favorite kind is just any genre of Persian music. I wonder whether I could start a thread here about why I like that so goddamn much. I guess I could, although I don't know how much I'd have to say or how long that thread would survive...
Like, basically, I find that Persian (maybe even specifically Iranian Persian) music has particularly complex melodies and has succeeded in carrying such melodies across a wide variety of genres. Also, it's the only kind of music where I personally find influences from Western music almost always being effectively incorporated into the existing musical tradition, rather than replacing that tradition wholesale and making it seem largely forgotten (which I feel is what happens with every other kind of music I have ever seen, once it comes into contact with Western music).
I also thought of starting a thread on world music, but AFAIK, that's not all that popular among the users of this forum either, so I'm afraid it'll end up being nothing more than what I already do on the existing threads for songs.
OK, I'm done thinking aloud now.