I am liking the ghostly murderer/ghastly grave digger. There is something just sinister about them. Their glow and the murderer holding, what is that a dagger, and looking for a victim to stab. Just evil. Thats old school Diablo imo. I found myself coming up on them in the crypts and just sitting there watching them in their natural habitat like I was on a NatGeo documentary.
It can be the beta or if you've seen other spoilery clips. Exclude bosses, as we all like them$!
Having played the Beta, Grotesque (Corpse Worms) and Unburied are probably my favorites so far. I am looking forward to the variety of Bestiary. Everyone seems to focus on drops and stats in Diablo but I think the monsters is what makes the series.