- Castles. I simply don't like them, never did, neither the size nor the architecture or what they stand for... Everybody else may dream of being a prince(ss) in a huge castle, but I can do without it.
- Huge builds in general. Unless the number or the situation of the sims involved justifies it, I prefer smaller homes where every room has a purpose and it doesn't take two sim hours to get from one activity to another.
- Related to the above, rooms that serve no purpose. It may be the prettiest room in the entire house, filled with the most expensive works of art, but if my sims never have any reason to be there, it has to go. Or be filled with something useful.
- Open floor plans of the kind that you often encounter in modern houses and apartments, where the entire living space is basically one big room. Bonus points if said room is also relatively empty. I call this the warehouse style.
- The taller wall heights, except in builds that make clever use of platforms and/or big objects.
- Long, narrow bathrooms with two doors, big bathrooms with just one toilet and sink inside, and public bathrooms on the upper floors of community lots with none downstairs, all of which are unfortunately very common in premade builds. Maxis can't do bathrooms!
- Last but definitely not least: The overuse of clutter. I can't state often enough how much I hate that, or when builders "create" new objects my MOOing together existing ones into something non-functional. And how proud they usually are of their abominations.