I am also left handed. I have learned to adapt in a right-handed world, as you also most likely have as well. This means that we lefties are using both sides of the brain more so than righties. Therefore, I don't believe that it would be any more benificial to switch headphones around. Our mighty brains can adapt. Then again, it wouldn't probably be harmful, either. You could try it out, but if it gives you a headache, go back to the recommended setting.
