Which units in the Dungeon castle do you dislike the most (based on their appearance)?

To be honest, I don't like the look of these demons in Heroes 5 at all. They look like some kind of aggressive animals, and the upgraded ones even seem to have their brains fried! Only the Hell Steed or the Nightmare (I'm ashamed to admit, I don't remember which one is upgraded) and both of the Cave creatures look decent, in my opinion.