I am all over my house with my laptop: living room, bedrooms, dining room, kitchen. I can't face a wall, I have to face a window. I can't look up and see a barrier. I need to see trees, grass or the back of my house which borders a woods where I can see deer (morning and twilight) or wild turkeys and other sundry creatures.
Can't have my back to a door either. I startle too easily. I think I could have a heart attack. Just someone walking in to say, 'Hey where's the peanut butter' can make me jump eight feet and I lose all train of concentration.
I follow the sun, too. I adjust the laptop so the direct sunlight's not on it and can write away for hours. When the sun moves, I get up and move, too.
I have a hard time writing at night.