CF
I am left handed and dual rated (Helicopter and Fixed Wing), I always found flying helicopters more natural for some reason.
I find my self flying right handed in an aeroplane with a centre stick and swap hands when operating radios, throttles etc.
I am more than happy in the left or right seat of a helcopter and don't even think about it.
I found it easier being in the right seat of a helicopter for intial training as I think being left handed makes it easier to get your digits over to radios and the like without thinking about it too much.
My initial training was some 12yrs ago now so my recollection is not to clear.
The obvious advantage is that I can write with the lever hand, and dont have to think too much about that either.
V.