Which units (BASED ON THEIR APPEARANCE) in the Haven castle do you dislike?

... As you all know, monks should fight without armor,

But they want to live :D And they are not Tibetan monks, who, by definition, should not wear armor. They are just ordinary monks. They are in war zones, so that they don't end up like the priest in the Heroes 5 video, they wear armor.

but if they put on an ugly pot on their head, that's against the rules!

No, it's a normal visor, better than being bald.

P.S. Dear Magnus, could you please tell me the release date of Oblivion?

The exact release date of TES IV Oblivion is June 24, 2006.