The thing about our house that I find unusual is that we don't have a front door. It's not unusual in the country to use the back door, but we don't have any choice in the matter: there simply isn't a front door to use if we wanted to.
It's our own fault. We built this house and we just didn't include one. We forgot. So all our guests come in through the laundry. I just have to make an effort to hide the dirty underwear.
The thing that most visitors find unusual about our house is that we don't have curtains or blinds. That's because the eaves keep unwanted sun out, and with a 1-kilometre driveway we have no need to protect our privacy.