In my opinion, all the castles are beautifully and well-made. My favorite is the one from the Stronghold faction. It has an amazing landscape and fitting music. I also like the Necropolis castle – it’s austere, impressive, and even somewhat solemn. The Academy castle is too minimalist, which makes it feel a bit depressing. But the cult of women is impressive! The Magic Guild has a luxurious city, but I don’t seem to like this faction very much, so it doesn’t really interest me.