There have been arched openings in walls for over 1000 years, so you wouldn't be going with a fad. As with anything, it's how it's used and the context. I'm looking at a shallow elliptical arch from our living room to dining room. It might be what sold this house in 1950, but it's poorly proportioned and too close to the ceiling. If it wasn't a plaster wall, I'd have plans to get rid of it. Do what you like!

I echo the "build what you like" sentiment - you should get enjoyment out of your own house. That said, if there's a chance you may sell any time soon and recouping costs matters to you, you may want to pay attention to your local market and see what other houses around you are doing. I personally am not a fan of arched doorways and walkways unless they are in true mediterranean styled or old-world homes, where I would expect to see them, but that's just me, and tastes are subjective. Plenty of people do like them. If this is your forever home, I say go for it -- I'm not sure my dislike for them would prevent me from buying an otherwise great house.

I like arched doorways and windows. To me, they have much more personality than squared ones. If you like them, have them. It's your house.

If it works with the style of home you are building then it is not out of style. It's only out of style when it doesn't work with the style of the house or when someone likes one from column A and two from column B where they throw everything at the house because they can't make up their mind.

It all depends on the architectural style and detailing of a house. The "do what you like" approach can easily become a vivid demonstration of not knowing what you don't know, so you really should do some reading and research on acknowledged architectural styles and detailing. Plenty of good books on the subject.

I love arches. there are so many types. it might help if you posted inspiration photos of what you're envisioning.

Wow thanks everyone for all your input. Just a little more detail here and sorry for the long post. currently we live in a pretty traditional house built in 2017. White cabinets, some cedar trim on the mantle, over hood, and dining. All walkways transitioning from room to room are the soft arches.
We are building a home now and looking to get away from anything farmhouse and slightly more modern. We don’t want to go so modern where it’s all neutral colors and all sharp lines.
We were thinking something in between. I’m learning these terms and styles so excuse me if I’ve mislabeled anything so far but I think it’s called transitional.
We’re afraid of ending up with a mod podge that doesn’t all go together. So far we have a double iron door that has a slight arch up top and a direct vent fireplace that’s more on the traditional side (fake logs). The interior doors will most likely be the design with the 3-4 rectangles on them.
As of now they’ve taken all walkway transitions out so it’s all the way to the ceiling. It’s just like that so we can see what it looks like. To me that looks a little off and needs a transition. Hopefully I’ve painted a more clear picture of where we are. Worried to just “do what I like” and end up with something totally mismatched with the rest of the house.
We mainly like the soft arches inside because it seems like more time and craftsmanship was put into it. Maybe that’s silly. Thanks again.

Another thing. Would it be weird if some of the walkway transitions were soft arches and some were square? For example from the kitchen to the garage and game room were soft arches, but from the kitchen to the great room was a larger square transition.

Arched doorways, windows, and pass-throughs tend to be common in Mediterranean/Spanish style homes or in homes with a neo-classical style. Without seeing pictures of your house inside and out, it would be hard to comment on whether or not this is a good idea.

Can you post some pics?

Have a Federal style house built in 1793- 1st floor has original archways from hall into living and dining room and those rooms have an archway between them and into the kitchen.

I told my builder if I see an arch anywhere im turning into a nun with a ruler....his builds are notorious for having arches. Im a modern type chic and I won't my house to look as moder as possible in 10 years but thats me.

Hey everyone thanks again for the responses and feedback. I think we’ve settled on straight rectangular walkways for room transitions.

Thanks again!