Bungalow floor plan for 3 persons, 130 sqm, please opinions...

Really try a different approach. Write down as a list what you value.
e.g. office (initially children’s room) downstairs
Dressing room in the bedroom
Living room strictly separated from the kitchen
Living room accessible through the kitchen
Terrace access through the kitchen,
...

Once you have the list, look through floor plans (not just bungalows) and tick off which floor plans meet your wishes.
I can also well imagine a house with a staggered floor (yes, it is disgustingly expensive) for you, where the children’s rooms and office are located upstairs immediately.

What bothers me about your floor plan (in every variant):
- awkwardly cut corridors in the living area
- access to the living room only through the kitchen (guests see your dirty dishes)
- garden access through the kitchen (we sometimes have shoes by the door, which would massively disturb you) and not to mention the children who rush through the kitchen with dirty shoes)
- The distinct L-shape of your bungalow makes a “circular” arrangement of the rooms impossible

As I already wrote, a bungalow thrives on having as efficient and short paths as possible.

It's starting to get serious, and even though I stick to my draft, I have implemented many things. I like the connection from the hallway into the rooms, and the widening should allow enough light to enter. I know the long hallway bothers many and certainly consumes some square meters, but in return, all room wishes can be fulfilled, so I could live well with this compromise. Please give me feedback. I am not resistant to advice but also defend my own ideas ;-) Overall, I come to about 130 sqm of living space + covered terrace. The upper floor is to be developed by myself. Next to a storage room, a children's room is to be created there.

You haven't really changed anything now, have you? Well, my points of criticism remain. And please explain to me why the access to the dressing room is through the hallway and not through the bedroom... I would then always have to run naked through the hallway.

I would then always have to run naked through the hallway.

and further through the hallway to the bathroom. Either family and nakedness are not a problem, or the nightgown stays on until the dressing room and bathroom. I don't like open-plan kitchen and open-plan dining room, and no guest can find the toilet from the living room.

I have nothing against walking naked through the hallway. This also keeps the option open later to repurpose the room. I also keep the window open in all weather, and it’s no fun to walk naked back to the bedroom at minus 10 degrees to get to the dressing room and change. I understand the objection about visitors looking for the bathroom, but do your friends only come every 10 years? Mine come regularly and don’t have dementia yet. So the way is clear after the first visit. I also considered planning another door from the hallway to the living room. But I think it might take away coziness from the living room. In the end, I live in the house 365 days a year and walk through the kitchen. Visitors are there a maximum of 52 times a year!? Most standard houses have open living and kitchen spaces, which is why the objection about dirty dishes is not plausible either. At least I create a quiet zone and can read a book without being disturbed by the clattering of dishes.

I would separate the sleeping corridor from the entrance area with a glass door. I would also equip the bathroom and the dressing room with glass doors (which can also be frosted) to the sleeping corridor to allow some daylight in and make the area more pleasant.

In continuation of the entrance area, I would provide a lintel at the living room and close the door opening with drywall - of course, only after the floor has been laid. On one side, a bookshelf can still be installed - this way, a door could be added at any time if it proves to be useful.