Can I put my two cents in?
I read that DLP Sleeping Beauty Castle was designed to look more "storybook" in architecture and landscaping because of all the "real" castle in Europe. It does rock. It is beautiful and wonderful to walk through. And the dragon is awesome. La Chateau de la Belle au Bois Dormant is my favorite Disney theme park castle. Although I will always have a soft spot in my heart for the "castlecake" os WDW's 25th. =8^)
I don't think all the castle have to look alike. Different castles would give each park its own "personality". Following that train of thought: TDL and DLHK are getting "cheated" out of their own castles.