How do you organize your noble mansions?

I let gameplay guide my builds. So even with larger homes, I like to keep the rooms on the smaller side and intimate. There's a soft limit of 25-30 Sims per lot, so I try not to build anything with more than that many Sims in mind. I also don't like to have a lot of empty space that my Sims have to walk through, so the rooms aren't that big and most of my practical rooms are nearer the center of a big build or near stairs and the more impractical rooms (e.g., gym and pool) are further out. Similarly, the nursery is closer to the center and the master suites are further out. The main home has 9 bedrooms with space for more.

My Sims are not royals or nobles, just a normal-ish modern wealthy family, so while they have a staff that helps with their homes, including a fantastic live-in butler (and while they are working on integrating robots into the maintenance of a second home), they cook themselves and sometimes clean too. I build the rooms to suit them individually and as a family. With only 8 spots in a household, I don't want to give any to a staff member when I don't even want to play that so I don't have large staff areas and household kitchens are for my Sims to use.

Normally, I add details and other decorations as my Sims live in a home. Since their second home is newer, it doesn't have a lot of decorations yet.

Example pictures under the spoilers (Warning: I'm too lazy to take new pictures, so these are mostly recycled. This isn't close to every room, but it's a lot. :) )
Dining - Most of the time, they eat in the kitchen, but there are other areas for more formal and other occasions.


Bedrooms (main home only) - They're large but practical.


Family living spaces (main home)


Family living spaces (second home)


Offices (main home, then second home)


Ceremonial Room (It's small and chapel-like).


Outsides (from the back)