Floor plan single-family house ~165m² plus basement

What exactly makes someone choose an 88.5 wide door for a pantry instead of 76?

The pantry is hidden behind the kitchen door and has a door opening of 80cm. But since I want to work with a standard door width, I have to choose between 88 or 76. The idea is to be able to get through the door easily, even with cabinets. For a large kitchen, I wouldn’t have chosen a hidden pantry. Maybe the topic is overrated and I’m not making a mistake with either 88.5 or 76cm.

Window in the bedroom facing north. There are 3 proposals… One is "Vorschlag_1", then "Vorschlag_2" and like before (see "Nord OST Ansicht.png"). What would you choose? See red circle.

None of the three… take what is also installed on the front, plan right

The floor-to-ceiling window in the living room area, that is, behind the couch, is actually unnecessary.

That is not unnecessary.

What do you think if I make a normal window out of this again?

Nothing. You have enough partition walls. The floor-to-ceiling window gives you options and a connection to the garden.
Or do you need something for an orchid parade?

I would place the bedroom, if the bed with the headboard is against the exterior wall at the bottom of the plan, rather with a narrow window at sill height 5 to the right and left of it. This sill height 4 window is somehow completely unmotivated in the room.

I would rather question all floor-to-ceiling windows on the upper floor, especially in Child 2. Although I also don't like this division with the almost glazed sill.

I am still missing a window on the ground floor on the left side of the plan in the kitchen area.

... 60 cm wide door openings for pantries are more than counterproductive if, for example, a freezer and similar items are also to be placed in there.

For the bedroom, if the bed with the headboard is placed against the outer wall at the bottom of the plan, I would rather plan narrow windows at parapet height 5 on the right and left of it. This parapet height 4 window is somehow completely unmotivated in this room.

How high is BRH5? Something like in "Fenster_Beispiel.JPG" but for the upper floor?

Floor-to-ceiling windows .. I would rather question all of them on the upper floor, especially in Child 2. Although I also don't like this division with the almost glazed parapet.

I'm still missing a window in the ground floor on the left side of the plan in the kitchen area.

Child 2 has a floor-to-ceiling window and Child 1 and Child 3 also, but only on the side. I don't quite like this division either; for 5k euros we can get continuous windows and a French balcony as a fall protection.

Now stop going through even more countless facade structuring variants. That leads to nothing but becoming even more uncertain with each additional one whether it really is the very best. You overlook the fact that the left light shaft grate is very close to the front door, just like the proverbial forest for the trees ;-)

... The parapet height 5 comes from your design plans. The windows on the upper floor are labeled with parapet heights 4 to 6, and the legend explains what each of these means.

I would not choose floor-to-ceiling windows at all in the rooms on the upper floor. Especially in children's rooms, particularly in Child 2, there will often be furniture in front of these windows, which is then visible from the outside.
Prefer wider windows with a parapet height of 80 to 90 cm.