Water usage is probably my biggest. Living in a high desert, my wife and MIL see no problem with filling one side of the sink with hot soapy water to wash a few dishes because “that’s just how I’ve always done it”, to watering the grass and plants for hours. All of this makes me mental.
I’m curious as to where you live (city, suburb, etc) and what the age group of the people are
The most average. Middle america, 30s to 50s age.