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

Ghost - awesome!
Vampire Lord - even more awesome!
Lich - they made a real masterpiece, even better than an Archlich, I don't even want to improve it! So, just a Lich.
Undead - no need to say, it's cool! If the Nazgûl didn't have green stripes, I would have chosen it!
Ghost Dragon - no comments!