Ceilings/Walls - Woodchip wallpaper or decorative quartz

If it were up to that, I would also like real gold taps...

If I had golden taps, I would unscrew them, melt them down, sell them and use a fraction of the proceeds to install something nice. Gold-colored taps in a roughcast wallpaper house... maybe that will become trendy again-

If someone doesn't like it, okay. But please don't badmouth it for that reason.

No one is doing that. Commercial wallpaper had its time too. Had. It could come back again. Raufaser as well. But at the moment it's simply not in style.

Raufaser can be slapped on the wall at Q2 and it fits.

That may be, but it’s not supposed to be "slapped" on or just "fit," it’s supposed to be beautiful. As writes, there was also a time when fiberglass wallpaper was used, which was the easiest to work with. In my opinion, even that would allow significantly more elegant design possibilities than Raufaser.
Well... the OP will take a look and then decide for themselves.

Not everything that’s trendy is good.

True, but that also equally applies to everything that’s not trendy.

Fiberglass wallpapers are also really trendy in our neighborhood right now.

Oops... I think they’re more “trendy” when being removed rather than when being installed, because currently hardly anyone puts fiberglass wallpaper up.

I’d rather stick with the proven Raufaser.

If you like it that way, then it’s right for you. That’s how it should be.

I’ll rather stick to the proven textured wallpaper

Yeah, with the tried and tested Gelsenkirchen Baroque, certainly nice too!

To speak up a bit in favor of the unpopular "Raufaser": we also decided on it. Reasons? - freely paintable for color accents (plus compared to wallpaper, because much easier) - paintable multiple times (plus compared to wallpaper, if you like changes) - warm to the touch (plus compared to plaster) The latter was really decisive for us. The first two points are of course also fulfilled by plaster, possibly even better. But plaster feels cool, harder, somehow more distant. Of course, it fits perfectly with many modern styles, but we simply found "Raufaser" cozier.

To break a lance for the unloved textured wallpaper: we also decided in favor of it. Reasons? - can be painted freely for color accents (plus compared to wallpaper, because much easier) - can be painted over multiple times (plus compared to wallpaper if you like changes) - warm to the touch (plus compared to plaster) The latter was really decisive for us. The first two points are of course also fulfilled by plaster, possibly even better. But plaster feels cool, harder, somehow more distant. It of course fits perfectly with many modern styles, but we simply found textured wallpaper cozier.

That's exactly what matters!!! The paintable plaster of course has the disadvantage that the sand grains are always there and removing them would be a bit of a mess and also laborious. Currently, we have fleece with paint on it but who knows what it will be soon. Ultimately, there is no ONE advantage but you just need a little imagination or advice to make both options look nice.