Dream house floor plan - 173m² with 3 children's rooms

The main argument is the shared workspace for the large family and the access to the sink/trash from the dining room / south terrace.

You have implemented these arguments well with the "technology-free" island.

That is currently our plan or idea for the kitchen and it will be realized about 95%.

We solved it quite similarly - also with the door from the kitchen area to the garden. Overall, we are quite satisfied with it, but the layout also has disadvantages. The most noticeable is the door that opens inward (I was convinced by our window installer and no longer remember exactly why). The open door blocks three drawers and a section of the countertop and can, if unlucky, collide with the oven door opposite. Therefore, this door is always closed when working in the kitchen. That is a bit of a shame, as we have a nice little terrace spot and herbs in front of the door. In summer, I would often like to have the door open. This "problem" worsens if there are no other exits to the garden, because you probably don’t want to endure the through traffic of housemates while cooking in practice. The doorless island solution should offer more advantages for .

Yes, there are always advantages and disadvantages. And everything remains a compromise. The only important thing is that the compromise you make for YOUR construction is right for YOU. We know the disadvantages and can live with them.

So, I already wrote that we have a similar / identical layout in the kitchen area and consciously created an open-plan space.
It never occurred to us to design the kitchen in a U-shape. Something like these arches would be dreadful for us. 70s/80s elements from cheap prefab apartments or established single-family homes with brown bathroom fixtures come to mind. But well. If it pleases you. Go for it.

That would currently be our plan or idea for the kitchen and it will be implemented that way about 95%.

The two-liner was also in the running for us. For cooking together, I find the island better. If you mostly cook solo, the two-liner with sink/trash - work surface - cooktop is, in my opinion, ideal.

I don’t want to convince anyone of anything here, but I do wonder why the arches are frowned upon so much here. Attached are two pictures. One of our current arch and one of a nicely designed hallway, just as I could imagine it for us as well.

I don't want to convince anyone of anything here, but I do wonder why the bows are so much frowned upon here

Frowning comes quickly when someone implements something that has gone out of fashion. In the pictures, the bow is a design element that, from the chosen perspective, provides a frame for the view into another part of the building. The pictures look quite appealing to me. Purely a matter of taste.

I agree completely. Purely a matter of taste. Not my taste, but a matter of taste ;-)

I also think that everyone can see it that way for themselves. My only question would be what one wants to achieve with it. Does it then offer me advantages in function or utility, or do I create an optical "advantage" such as a recognizable style? The danger I often see is when you arbitrarily combine individual things, which then carries the risk of ending up as Gelsenkirchen Baroque. I think one should consider that aspect. I have been to Arab countries several times and therefore I like the round arches and the playful elements as well; however, this would then need to run as a style throughout my house (and probably outside as well). Mentally, I can also associate it with our simple terraced house from the 60s and the oak brutalist furniture as well as the orange wallpaper in circular patterns in my walk-through children's room. If I were you, I would therefore think about these two points, function and/or living style.