I've been listening to a lot of Electric Wizard lately, mainly just their latest album, Black Masses, over an over. It's pretty amazing shit.
I have never touched drugs either, but I can't resist their tongue-in-cheek aspect to their music and the low, wailing riffs and crushing basslines. (And how about the Mellotron on "The Nightchild"?)
I can't stop listening to "Crypt of Drugula" for some reason...creepy as hell. And when it comes to music, I can't get enough of straight-up creepy.