OK, so I guess I have different ideas about what kind of heavy metal Shadow the Hedgehog likes compared to other people. I was talking with a friend of a friend today, and he said that edgelords would be more into more recent stuff such as AFI, Killswitch Engage or anything like that that could be found on Hot Topic shirts.
In contrast, my headcanon about Shadow has him liking NWOBHM, thrash metal, speed metal, death metal and black metal, which would mean bands like Iron Maiden, Diamond Head, Metallica, Slayer, Anvil, Acid, Cannibal Corpse, Vader, Mayhem, Burzum and stuff like that. As a matter of fact, my headcanon also states that Shadow's favorite band is Iron Maiden, and I picture Human Shadow wearing an Iron Maiden shirt. I realize not everybody will agree with this, but that's how I see it.