First heard Metallica - changed my life.
Firrst heard Trivium - thought: "yeah that was alright".
No contest for me really.
Still if we'd had internet forums back in the mid 80s no doubt there would have been someone saying that they preferred Metallica over Motorhead or Venom and plenty of people would have said "what the fuck?!!!"
This is the next generation of metal folks, better get used to it.