Whats the most obscure genre in your music collection?

I dunno, I'm not really crazy about genres and sub-genres to be honest. I do listen to NWOBHM, which isn't a genre per se, but more of an underground movement in British heavy metal back in the late 70's/early 80's. Most of the bands were really only known to true fans of metal, but a few made it pretty big, like Iron Maiden and Def Leppard (who went pop anyway, with "Pour Some Sugar On Me").