Well that's valid af tbh.
But hey, what do you mean by heavier? If you'd like to send some recs...
Oh i started listening to a lot of Death, Black and Doom metal. When i was younger people would always say that tastes in music will change (guess its the early, its not a phase mum). I found that it expands instead, i still listen to 80's soft/classic rock, grunge/alt and metal as well as a lot of more ambient or folk works that i got into a lot later.
It's good to see younger people get into older stuff and even better to see it portrayed in Manga like this.
Yeah, as I said once, I think the internet is a blessing on this aspect. If facilitates a lot for us young people to get to know genres outside of what is currently popular. And that is B E A U T I F U L. I will forever thank Arai-sensei for bringing this to a storyline because I don't see it mentioned very often — even young people seem to ignore that privilege.
Oh and you like Death Metal? I'm more of a Hard Rock type of gal but as a brazilian I know of Sepultura, and am extremely proud when I see metal fans mention it. Have you heard of them?
https://youtu.be/F_6IjeprfEs
I must admit that I only listened to a few of their songs because the only Metal I truly dig is Iron Maiden and this specific anime ED (https://youtu.be/Xht6qmbYRD8), but I hope you enjoy them.