More things I like for the algorithm:

Yu-Gi-Oh
Pokemon
Lord of the Rings
Metroid
Castlevania
Power Rangers
Final Fantasy
Guild Wars
League of Legends
Warhammer 40k
Naruto
Fullmetal Alchemist
Death Note
Overlord
Goblin Slayer
Rising of the Shield Hero
Gundam
Metalocalypse

It doesn’t matter who you are or how long you’ve played music. Once somebody asks you to play them something we all forget every song we know lol

For the algorithm:

Death Metal:
🖤 Death
🖤 Archspire
🖤 Necrophagist
🖤 Inferi

Thrash Metal:
🖤 Megadeth
🖤 Vektor
🖤 Bonded by Blood
🖤 Gwar

Classical:
🖤 Bach
🖤 Vivaldi
🖤 Tchaikovsky
🖤 Saint-Saëns