Riders are generally by nature fiercely independent and lovers of freedom as is displayed by their love of vehicles that allow them to be out in the open air the whole time and aren't even really tied to roads. Truck drivers are highly practical and have a special understanding the poeple of different areas and of how the world actually works gained by their exposure to said peoples and need to consider the impact of every mile and regulation to their livelihoods. They also will tend to be more independent as they have chosen a career that does not tie them to one office or location.