Which plaster is recommended for a double garage?

Women have a keen sense for taking offense at the core message "Honey, I'm brooding over complete nonsense, would you take that off my hands?"

In our relationship, I'm always the one brooding over complete nonsense. My husband couldn't care less about 95% of these things. :D

Otherwise, I also wonder why designing the garage is so frowned upon here. I know people who have windows and tiles in their garages and such. They probably even celebrate birthdays in there.

Otherwise, I also wonder why designing the garage is so frowned upon here.

Frowned upon - no. I'm not going to tattle on the OP to Santa if he treats the garage to an interior plaster. I just say that for an interior garage plaster, I don't need a specific product market overview because I can recommend "none at all" as an absolutely sufficient option based on many years of experience: it is cheap and not really missed. Especially those home builders who have been stumbling from one sampling to another for several weekends often can't see the forest for the trees.

A bit differently: I would never have thought of not plastering the garage. In all the new development areas and also in existing buildings, all garages are plastered. Therefore, I found the suggestion interesting, but also confusing at the same time, that I now seem as if the garage and the car are sacred to me.

A different approach: I would never have thought of not plastering the garage. In all the new development areas and also in the existing ones, all garages are plastered. That’s why I found the suggestion interesting, but also confusing at the same time,

You know all the garages in your building district from the inside??? – that, in turn, I find interesting, but confusing at the same time ;-)

that I now seem as if the garage and the car are sacred to me

I rather had the impression that you simply hadn’t "had on your radar" the most obvious alternative.

Seems like quite a bit of wine has been drunk again by someone. Are there also garage rules that one should be required to read? The one-time note that you don’t necessarily have to plaster the inside of a garage should probably be enough. If people had to be instructed on that, the psychiatric hospitals throughout the entire EU probably wouldn’t be enough to accommodate Germans who have had their garages plastered on the inside...

I’m always amazed by the dedication with which people create a home for their metal box, one that would make any prefabricated apartment resident jealous. But if someone thinks they need it and can pay for it... why not.

Looks like quite a bit of wine has flowed for someone again. Are there also garage rules that one is required to read?
The one-time note that you don’t necessarily have to plaster a garage interior should probably suffice.
If one had to be admitted for that, psychiatric hospitals across the entire EU probably wouldn’t be enough to accommodate Germans who had their garage plastered inside... [...] But if someone thinks they need that and can pay for it... why not.

Nice that you repeat my messages in your own words once again (even if that is inconsistent insofar as you rightly think a single note would have been enough). Garage rules that apply as relentlessly as the cellar rule (which I merely formulated, even if many doubters overlook that) I have at least not discovered yet. Plastering a garage interior is for me, as a prudish Protestant Prussian, naturally the epitome of gluttony. But as an immigrant child born in the Rhineland, I have learned to be magnanimous, can distinguish crazy from nuts, and would never commit others to a madhouse. By the way, I have never claimed that decades of expertise and experience would make the person who has them objective. That is why you will never read advice without background explanations for self-assessment on my info blog.

I am always amazed at the dedication with which people create a home for their metal box that would make every block apartment resident envious.

Even in my roughest garages, there was never a fitted kitchen with a serving hatch; therefore, they all had to envy a proud "panel building" ;-)
By the way, the bedroom of my current metal box is itself a metal box, which was also good enough for the Fiorano :)