Interior walls: which top plaster or "top layer" should I apply on my wall?

Hello everyone,

I am currently facing a difficult question for me, as I unfortunately have no idea about the topic and read many different views and contradictions on the internet about interior plaster [Innenputz] (which could also be due to me being a layperson in this field).

My situation: I am currently renovating my house from the late 60s and have completely redone the electrical system. So I chiseled new grooves into the hollow bricks and then plastered them up again. The plasterer plastered and smoothed the walls over the entire surface with reinforcement. For this, he used Knauf Rotband Pro and Grigolin filler and smoothing plaster. The walls are now quite smooth.

What do I now put on top of the smooth walls or what do I have done on top of them? When my girlfriend and I look at it purely from an aesthetic point of view, a 0.5 grain size is a little too coarse for us. A completely smooth white wall would probably be high-maintenance or you would have to be careful not to damage it visually. Since we have a 1.5-year-old daughter and are planning more children, this is impractical. And then there are various aspects with moisture-regulating, breathable, paint, brush plaster (Knauf Easyputz 0.5mm), lime gypsum, only gypsum plaster.
Furthermore, our plasterer says he only does 1mm grain size because 0.5mm grain size has to be sprayed and cannot be applied by hand, so he does not do that.
I have understood Easyputz/brush plaster, we could do it ourselves, but it is not a real plaster, rather a paint with some structure.
I am unfortunately totally overwhelmed.

What would you do with a smooth wall that has been smoothed/plastered with Rotband Pro and Grigolin and why?

What would you do with a smooth wall that has been filled/plastered with Rotband Pro and Grigolin and why?

Whatever I like ;-)

I’ve already had some properties:
- in one house we had Knauf roll plaster, it was good
- currently also paint/roll plaster, Haering Deko Quarz Elf – definitely better than Knauf, also easy to tint (choice between fine, medium, and coarse – I find fine already too fine)
- just plastered and then painted (in a new building) – that was also great, but there were a few "settling cracks" that you naturally notice at first
- painter’s fleece and paint – very fine and smooth surface, not as sensitive as just paint
Today I would choose one of the last variants again.

A completely smooth white wall

... feels like being in a hospital and almost always makes a room feel cold and uncomfortable.

In addition, our plasterer says he only does 1mm grain size because 0.5mm grain size has to be sprayed and cannot be applied by hand,

That’s nonsense. You CAN spray it, but you don’t have to. Rolling works just as well.

And then there are various aspects with moisture regulating, breathable, paint, paintable plaster (Knauf Easyputz 0.5mm), lime gypsum-, just gypsum plaster.

You can forget all of that since you only have a gypsum wall anyway. Anything with silicate is a waste since it has no effect (while everything else with paint or coating also has no effect) and possibly only works with pretreatment because silicate silicates on mineral substrates (silicate dispersion is more like a normal paint). And truly moisture regulating (to some extent) cannot be achieved by any plaster (proper clay plaster on the wall excepted). Walls don't need to breathe either. Only latex paint forms a truly dense layer.
Therefore, the material for the last 0.1 mm doesn’t really matter.

Since we have a 1.5-year-old daughter and plan to have more children

... any wall can become maintenance-intensive. Especially with muddy hands, the first crayons, etc. (can tell you as a father of three).