It all started with Natalie Fucci. She was one of the Sneider brothers' many babysitters, but she was by far the coolest, and she changed my life and my taste in music when she handed me a homemade mixtape featuring her favorite band -- Metallica. I was around 12 or 13 years old when I started listening to the metal band, and 20-plus years later, I still haven't stopped headbanging in my car, where I can really crank up the volume and rock out to "Blackened." So imagine my delight when a digital copy of Metallica's new album …