Single-family house, two floor plan variants from the architect

Okay, then two points are clear now: First, you can crumple the plan because corrections are necessary; what’s behind the comma won’t work, so the whole thing needs to be replanned. And second, your initial question is settled or rather has been answered by reducing the possible answers to one.

Regarding the first point: If the polyhybrid room is not meant to be "just" a pantry/storage/housekeeping room but also a "backup kitchen," then it is decidedly too small. Then half a meter more width (not depth!) will by far not be enough to make the floor plan solution "work." Sodastream instead of beverage crates is not decisive here; that single point won’t make much difference. Regarding the second point: In the new draft, only the variant with the fireplace placed on the outer wall remains possible. You describe your husband as someone who only goes along with the open plan as a concession. Actually, the L-shape of the open plan could make that concession easier for him, if it weren’t for one crucial catch: the fireplace before the open plan bends turns what comes behind the corner into an “ambush” - with the consequence that he would find this open plan uncomfortable. A deer can’t eat when it’s afraid; this is a serious problem. In the relaunched draft, the open plan can stay, including its L-shape, but then the fireplace must disappear from the danger zone position. Since you have to plan anew anyway, also get rid of the Jekyll/Hyde double role and perform a separation operation between, say, pantry/service kitchen but then please a separate laundry-housekeeping room. This multifunctional explosive device must be decompressed/relaxed from just under five to in total at least twelve square meters.

What began as an apparently harmless optional taste question now turns out to be a narrowly averted misplanning in two crucial dimensions. That was already more exciting than all the crime thrillers of the whole week.

Two of my girlfriends have exactly the same with the sliding door and also a similar size, so I decided on it.

as I said, they are also girlfriends

Well, then you obviously have to have that :p

Do they also have your house? Floor plan? What about the others? Do they have it like that too?
The sweater that looks good on my girlfriend doesn’t have to look good on me by any means. Just think about that.

Sliding doors are not exactly comfortable as regular doors. Closing them with your butt when your hands are full is not possible.

But of course you should be happy with your house – you can’t really argue against things like “my girlfriends have it too.”