I know there are a number of criticisms regarding housing, but I would really like to focus on is diversity in environments and styles.
1. The number of "evil" type dwellings is severely lacking, yet there are thousands of vampires and werewolves around. Where's a good crypt in a cemetery? An underground cave?
2. A combination house-boat would be great, especially moored on a private pier.
3. Personally, I want a house in Coldharbour or in the same purple/blue rock that permeates this plane of existence.
4. I just completed Eoki's quest chain in Vvardenfell and I do not understand why the Telvanni house style didn't make it into the Crown Store. Instead, we got two very brown, muddy dwellings that are very similar and look like they fell out of Tattoine. In stark contrast, the Telvanni tree-houses are absolutely spectacular in color.
How about you? What would you like to see concerning aesthetic and environment for housing?