I have only ever flown fixed wing aircraft. They are generally flown from the left hand seat.
I have noticed that helicopters are generally flown from the right hand seat.
Does anyone know the historical reason for this?
On older helicopters the collective levers (that control blade pitch on the main rotor) were shared between the seats and located physically in the center of the aircraft. Most pilots prefer that the cyclic, which tends to need more complex and frequent adjustments, can be used with their right hand, so having the collective in your left hand and cyclic in your right hand meant the pilot would generally sit on the right.
Most of the cockpit controls for things like engine controls and navigation are also in the center, so it’s generally better if the pilot can keep their right hand on the cyclic while operating these.
Newer helicopters often have a setup where there are independent collectives on the left side of both seats, but the tradition remains as there’s really no reason to change it and no reason piloting a helicopter has to match driving a car.