As a kid when you drew airplane pictures...which way was the plane flying ?
Usually it's right to left on the paper....so you see the profile of the aircraft from the left...thus it's the side where you also draw your doors.
If you make it to the big time as a designer....this train of though just carries thru.
[This message has been edited by Carioca Canuck (edited 12-07-2000).]