10ft tall all down the driveway, so the potential new neighbors can't sit there and creep on me on their porch while i'm watering my plants in the drive, and as a bonus it'll keep their tree's stupid leaves in their yard where they belong
you can't even say i'm becoming a suburbanite, the town i live in is rural 
You might wanna check local regulations for that, a lot of places won't let you build fences over 6 ft without a retaining wall or bullshit like a lattice along the top or I assume it would be a lot more common for people to build fences where they can imagine the world stops at the wooden border around their house.