Height of tiled walls in bathroom 1.2m or 1.5m?

Just to throw in another opinion: Shower up to ceiling height, otherwise 1.80m

1.20m is really bad because there are probably switches or sockets nearby.

yes, that's true. I have depicted the situation in my program.
Rau thermostat at 1.4m. Switches at 1.05-0.97-0.89

Yes, and? The thermostat can also be installed without tiles.

It becomes a problem at the latest when you don't set the switch to 1.05 but a little higher.

We approached it differently:

[*
Decision made about non-functional requirements
[*]Decision made about functional requirements
[*]Decision about arrangement, lighting, materials
[*]Decision about tone, specific inventory, fixtures, tiles, color
[*]Determine where water hits the wall.
[*]Develop an idea of how it looks when only those areas are tiled.
[*]These minimum areas were aesthetically supplemented so that an appealing interplay between tile and non-tile arises and the formats of the selected tiles are optimally used
[LIST]
[*]if that hadn’t fit, we might have chosen different formats
[*]the heights came about naturally

We made some decisions when we were already able to walk through the room, drew on the wall, and thus could make the final decision on the live model.

When planning, I am on my own. My wife at most says: yes, that looks good or (when I have already accepted it) no, I want it differently. She simply takes care of other things. Therefore, I have drawn the house completely in 3D and keep adjusting it. This is how I helped myself accordingly. A nice side effect is that I can create one or the other drawing and hand it to the craftsmen on site. I now have to at least specify my ideas concretely because I have to communicate the areas to the tile studio so that they can send the offer to the general contractor tiler. For the bathroom upstairs, I have now decided on 1.2m. For the guest bathroom, I have the problem that the parapet height of the window is at 1.42m above the finished floor level! That means either tiling at 1.2m with 22cm plaster between the underside of the windowsill and the top of the tile. Or tiling at 1.5m and then no windowsill but a tiled parapet. I practically have to decide that too, as the tiler also orders the windowsills. Here I could ask the next question: windowsill or tiled parapet with a relatively high window?

We used real window sills everywhere because we simply do not find the tiling attractive.