Hee. That's funnier than you know. ;) But I can't be Aziraphale! I have dark hair and good cheekbones!

Actually, I'm kind of seriously entertaining this Serpent of Eden idea. Everybody gets a snake and an apple, right? (And it would fit my habit of good but wildly impractical costumes.)

Also on the snake theme, I am also toying with the idea of going as a big honkin' Deathly Hallows spoiler.