So allow me to share with you my seasonal playlist (that, to be fair, gets played pretty frequently all year long). I didn't include the Monster Mash-y, kitschy stuff, instead opting for a sprinkling of Jonathan Coulton when some nerd flavor is required. Some of the tunes don't reference Halloween-type topics, but have a spooky feel to them, and there's plenty of old school Goth for good measure. It's currently 77 songs long, so you should be able to find more than a few bits of choonage to your liking.
Go forth! Listen! Enjoy, and Happy Halloween, internets!
* Music-based Life Form