The left/right PIC seat is a subject to which people devote entirely too much thought and analysis. It is completely arbitrary based on manufacturer. I've got so much time in helicopters that when I build my dream fixed-wing (Lancair IV-PT) the PIC seat will be on the right so the side-stick will be in my right hand and the throttle will be in my left.
Speechless Two: "Probably if you ask 100 pilots you'll get 100 different answers!"
B Souza: "Actually its because very few can be flown from the middle................#101"
Glad you said "very few." Stan Hiller would indignantly point you to his Model 12. Bell would probably point to the J-model (not entirely accurately as far as this thread is concerned). And Igor would say, "Da, but vee only put one collective in zee R-4."