Martin1234,
Whether your blades turn one way or the other, the collective is always on your left, therefor it is easiar to sling from the left seat. This is most prevelant in the S-61 where slinging (Long-Line) from the right seat is virtually impossible due to the distance from seat to window. Even in a 205, the prefered seat for slinging is the Left seat.
The real reason we have the Right Seat designated as the command seat is because, we as Rotary Wing pilots, are very stubborn and want to be different from Plank drivers!
OffshoreIgor