If you live on a country road they are often fast, unlit and have no pavements, so what seems like a 20 minute stroll to the village for a pint is so dangerous and unpleasant, especially with children or dogs, that you will never do it.
As a townie I missed the anonymity. Everyone knows your business, neighbours will walk in through open doors, if you don't like someone they are still always right there in your face and at every event.
Everywhere is a drive away. I lived an hours drive from the nearest train station and missed culture, art, cinemas - well I missed the variety that connected living brings.
Winter is long, muddy and brown, so very brown.
The people who live and have always lived in the area will already have enough family and friends to last a lifetime and it might be hard to find your tribe.
There might be a local pub, shop or post office. Until it closes and then you have a 45 minute round trip for a pint of milk. You need to plan and you need a freezer.
There is crime, just like there is in the city. My neighbour's massive wind turbine was stolen one night.
The events will all be annual. After the first year you will know the open gardens, village fair, country show and am dram panto like the back of your hand. Then what?
Upsides - some people love it and it can be searingly beautiful and peaceful.