But working back through the thread
Fitted carpets as a bad thing? Not sure. Downstairs yes, hard floors and some rugs all the way (except maybe in a snug?) but having built a house with wooden floors upstairs I’d have wall to wall carpet in bedrooms if I was building again.
Lighting – as already said, just because you can with LEDs doesn’t mean you should. Most uses of LED strip will be for the bin (and I’ve never seen coloured lighting internally that looks good, though I think it’s great in a garden).
A grid of fixed ceiling spots gives horrible, harsh, light – good for cleaning the house but not for living with. Standard developer/electrician approach puts about twice the number needed in as well. Trashes soundproofing, fire resistance, air tightness as well while you’re at it. While we were building we rented a top floor flat in a victorian conversion that had bare floorboards with big gaps so we could hear every word in the flat below AND see the back of their ceiling spots (!)
Taps Anything other than a trad turn tap or a single lever is a mistake. A friend rented a place with waterfall sink tap where you turned it on by sliding two ‘bars’. Every time I used it I took about 4 goes to actually get the water to come on (push/pull/twist?)
Big opening doors I was dubious as to how often they’d get used but it’s surprising. Uncle and aunt have bi-folds on the side of a hill in Hereford and they spend loads of time open.
Most of our place is pretty minimal but the downstairs loo got an ‘unconventional’ suite and black walls, but then we acquired enough of this wallpaper to do two of them….
and the kitchen is matt grey rather than gloss white (which we naively thought wouldn’t show fingerprints and splashes…)