It wasn't my regular shift, but while in school sometimes I got to be the substitute DJ for Loud Fast Rules. Best two hours on radio. Anyway, some suggestions from my own heavy rotation:
Anthrax: Personally I'm a bigger fan of the John Bush era. Check out The Greater of Two Evils for his take on Anthrax standards.
Black Sabbath: Everyone should at least have the first album.
Body Count: Still pissed I missed them live in '92 or whenever.
Bonded By Blood: Check them out. They've been touring with some A-list bands lately.
Clutch: Earth Rocker is still one of the best albums ever.
D.R.I.: Metal meets punk.
Concrete: My cousin's band! Hardcore from Albany.
Death: Pro-punk from Detroit. A+.
Death Angel: Just classic thrash metal. Relentless Retribution is a great album.
Fu Manchu: Kinda sludgy, kinda stoner.
GWAR: Not sure it's that metallic.
Iron Maiden: Still my go-to.
Jimi Hendrix: Everyone here has Are You Experienced, right?
Judas Priest: Another go-to.
Living Colour: Not metal but still should be in everyone's collection.
MC5: Kick Out the Jams is another staple.
Metallica: Yeah, gotta have those first four albums. And, hey, they're playing Lincoln during Solo Nats!
Misfits: Classic American punk.
OFF!: More classic punk from Keith Morris.
Porn Orchard: Sludgy Athens band from late '80s.
Ramones: Another classic go-to.
Rush: Are they metal? Not sure but still love 'em--up through the latest release.
Slayer: Seasons In the Abyss is my go-to.
Soundgarden: Check out King Animal. I think it's as good as their early stuff.
Suicidal Tedencies: More crossover. First album is a bona fide classic. In the '90s they went more metal.
The Sword: Killer sludge. Check out Apocryphon.
Testament: Dark Roots of Earth might be my favorite.
Tool: All killer stuff.
Van Halen: Not metal, but love the early stuff.
War on Women: Saw them open for Flag, and they killed it.
The Who: If not for The Who, would we have metal as we know it?
And here, some music from The Sword: