Hmm...I would love to go as a Spectre or a wraith. I kinda like the bulky style of the Shadow-Web Maulers/Crushers/etc. etc. Maybe Dwyorgan too, because I really, really love that lantern of his. Where ever did he find one? I would also go as Apollo Bright One, Hermes Winged Way-Farer or Ares Savage Spear, because I like their animations and designs.
I've stopped dressing up but I never stopped using my complicated mind to make the best Halloween trick then treat. But if I were to dress up I think I'd pick either a Draconian or one of the Coven, they look cool.