Which flooring to choose for the ground floor - experiences?

This difference of at least 15 degrees with the tile is what subjectively triggers the feeling of cold. Thermal conductivity aside. Only does parquet or laminate subjectively eliminate the feeling of cold?

???

Thermal conductivity is the decisive factor, your parquet or laminate is also identically 22°C warm and thus at least 15°C colder.
But the tile extracts energy from your feet much more effectively (due to the better thermal conductivity) and therefore it feels colder: where the heat receptors are located in your foot, a 22°C warm tile makes it feel colder faster than a 22°C warm parquet.

Personally, I find tiles pleasant, even barefoot: They are pleasantly cool in summer and not unpleasantly cold in winter with active underfloor heating. In my personal opinion. I find real wood parquet visually one of the best solutions.

We have tiles in the living room of the current rental apartment, which is quite unpleasant. We decided on parquet in the new house, with tiles in the entrance area and kitchen. And anyway, no one is allowed to come in with shoes...

We wanted tiles in the (open) kitchen and a cozy feel in the directly adjoining living area. Also, we only wanted one floor because everything is open and there is no door in between.

So we decided on wood-look tiles to cover both criteria. Looks great. See photo. Currently, we also have tiles in the living room, without underfloor heating. We wear socks or shoes, so it works. In summer, it’s also comfortable barefoot.

In your case, I would do it the same way. Or inconspicuous tiles in the kitchen and parquet in the living area. I also think there should be a contrast. Anthracite tiles next to oak parquet, for example.

Under the island... hmm... then the heights just have to match exactly, so it doesn't wobble or stand crooked.

Nothing wobbles
Height adjustment is possible via the screed
The kitchen installers level the rest using the feet

Entire ground floor tiled, previously had laminate and after years it just looked bad, the same would happen with parquet.

But without underfloor heating, I wouldn't choose tiles; I set the storage room to 18° and you can really feel it when you step on the tiles there.

We have, after having fallen flat on our faces with vinyl

In what way did you fall flat on your faces?

We want tiles with wood look in the hallway, utility room, and bathrooms. Everything else vinyl in a similar wood look.