Thanks for sharing! I have known a few folks who like the heavier music, but rather than mirroring the, hm, strength of emotion found in it, they seem to enjoy it - find it soothing, even - while remaining remarkably kind-hearted folks too (some of the least angry I've known). It's something I've pondered on and off over the years. I remember asking a friend why they liked their particular heavy metal flavour many years back, and the answer was they found the music "glorious" and uplifting. I could see that.
Personally I find the vocals often too "shouty" to care for it too much, and the loud noises can be a bit too alarming, etc. The phrase "aggressive music" is a good one - I find the aggression alarming rather than having benefits for me though. (Although I'm still processing anger so who knows - maybe this is a stage I'll yet reach.
) This is another fascinating aspect of music to learn about though, thanks Crow!