Not all the houses in the US are as luxurious as you describe, multiple ensuites is VERY top end! Still, a standard two story, 3BR house will almost always have a cloakroom downstairs, and a bath and an ensuite upstairs. So, a toilet per bedroom! I do miss some US standards though. Bathroom sinks are most often a practical basin over cabinet, providing a place for all the things that need to be easily available: extra toilet roll, toiletries, tampons, bathtowels, and if no very small children, cleaning supplies. Bathrooms here tend to be more fashionable than practical. Almost every bathroom in every home we have had has a pedestal sink with barely room for the bar of soap, meaning someone, usually the mom, has to be constantly aware of what is about to run out where, if only so that she wont be the one sitting on the toilet and discovering she needs something from the closet down the hall. See also, glass shower doors that cover the entire length of the tub and (whispers) single taps.
I tend to like Edwardian through the 1930s. Modern plumbing existed, so bathrooms were standard and tend to be largish, wheras older homes have had to have them shoehorned in or tacked on at least expense/size, and modern designers also seem to devote as little space as possible.
Fewer bedrooms, but larger as children were expected to share, and with todays smaller families it is plenty of room. I like the central hall way design common in those years, it provides what i think of as a neutral zone between rooms. A place for coat racks and book bags and mail and recycling bins and other stuff in the process of entering or leaving the home. And a noise buffer/temperature regulator between rooms or the outdoors. Big windows and bay windows to let in the light, our flat has glass transoms over the doors so even the center hall is light enough during the day. Kitchens can vary, though that often seems to be remodelling choices taken later. In our block of flats, there were originally kitchens large enough for work/dining tables near the big coal stove, and a small scullery behind it for dishwashing and laundry. In ours, the original kitchen was made a formal(ish) dining room, and the scullery into a cramped kitchen. I would just as soon make the larger room a kitchen/diner again, and the smaller a laundry room with storage, which is what most of my neighbors have done, or kept, really.