the showers here especially have always made me slouch and I'm not especially tall at 175 cm! It was only after getting a shower where I could stand straight that I realized how much I'd been slouching over the last 17 years due to low shower heads.

That was a hard requirement for the house xD I can deal with ducking when I need to go to the toilet, but the shower absolutely has to be able to hit my head instead of my shoulders.