What's one of your favorite genres of music and what's your favorite thing about it?
Brazilian music is famous worldwide — from bossa nova, to choro, to samba.
Bossa is cool, choro is amazing, but my favorite things about samba is that despite being "pop music" it still has complex rhythms and harmonies.
My top favorite thing is the prevalence of the 7 stringed guitar and their use of counterpoints (i.e., parallel melodies).
I love how what (I think) started as guitarists just playing harmonies, turned into them improvising bass lines and counterpoints every once in a while, which eventually became them doing MOSTLY counterpoints and bass lines and barely playing the harmony lmao.
These bass lines and counterpoints, from what I understand, are often times arpeggiations of the chords and so forth, but they add such an amazing effect to the music.
They def won't be too extreme for you (I mean lmk if any are I guess), and some you'll likely know already probably, but you'll probably like some of them just judging from your challenge (mixed subgenres):
Insect Warfare
Skinless
Nunslaughter
Toxic Holocaust
Devourment
Whitechapel
Cattle Decapitation
Eyehategod
Nails
Wormrot
Anal Cunt
His Hero Is Gone
Carcass
Dropdead
Infest
Cryptopsy
Necrophagist
Magrudergrind
Sete Star Sept
Suppression
ACxDC
Lovgun (bisou, 2012)
Some of those are more yelly than growly, but check 'em out! Since you didn't call out a specific genre like goregrind or something I got a little carried away haha.
Metal is 90% terrible / discordant background, with 30 seconds of pure blissful harmony that you just wouldn't appreciate if that 90% terrible contrast didn't exist.
With time, and repeated exposure, you pick up on the small harmonies within that discord that will continue to blow your mind for the next 10 years as you recognise more patterns in the chaos.
This usually means that your least favourite song by Metal Band X a decade ago is now your favourite, and your most favourite song of theirs a decade ago now sounds like a mere nursery rhyme.