Hi Kiwi-first, what's with the fur-covered fruit with so many seeds? :-)
But since you asked . . .
American Toilets: have you seen how much we eat? Many Americans have a lot of stuff to flush! A favorite newspaper columnist wrote a few year ago that he's recently installed a low-volume flush toilet that used much less water than his previous fixture. But he had to flush it twice to clear our the bowl, and wound up using more water than before. I also believe there's been a view for a long time (changing slowly) that things are plentiful and widely available in this big, wide country, and that included a perception of virtually unlimited (and therefore cheap) water, gasoline, electricity, food, etc.
Taxes on retail purchases: some states, counties, and towns charge different amounts of taxes, and some charge none, so it varies from place to pace, and the "base" price at least let you know what you're starting with. Kind of like airfares that seem low, but are much higher once all the fees, surcharges, and taxes get piled on! A news program last week mentioned a restaurant in New York that was going to start charging 1 price, tip already included. That will be different.
American coffee: from the hemisphere that brought coffee to the workd, not certain what it was like hundreds of years ago, but I too have a Nespresso machine. Failing that, I have several French presses and a coffee grinder, and have always favored a very dark roast. Others clearly have a different view on that. As for brown water, ask the English about their love of Nescafe! Funny how the same company that came up with Nescafe also produces Nespresso.
American Appliances: see above. Many folks (and advertisers) have espoused that "bigger is better." And for those with 3 or 4-car garages, and really big houses, with big families (or just big houses and maybe they don't even cook that much at home), a small fridge would be out of place.
Number of bathrooms - well,not everyone has that many, and you can only use one at a time anyway. Unless, again, there's a big family . Now, if you could have two toilets and two showers in one room . . .