I grew up on metal. My mom has always been into 80's hair metal, and my dad has always been into 80's thrash metal.
My favorite bands from the earliest of my years until my teens, when I got into punk rock, were Metallica, Megadeth, Iron Maiden, Slayer, Black Sabbath, Pantera, Green Jello, Judas Priest, and Anthrax, as well as bands like Motley Crue, Def Leppard (Yes, back in the day I loved me some Rock of Ages...), Poison, Skid Row, Guns'n'Roses, Queensryche, and Tesla.
I still love me some thrash or butt rock to this day.
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There's only one newer metal band I can think of off hand that I like:
I don't care if they're a cartoon band; they're fucking rad!