Left hand turns usually allow for more visibility throughout the turn. Turning right on a narrow, 2 lane road can be spooky at times; knowing if you run it in a little hot and cross the center line, there could be a cage coming straight at you. Where as left handers, if you go a little hot, you may run off the road a bit but not encounter any cars.
Personally, I"d say I'm pretty even when it comes to turning in either directions. I do, however, like to ride the clover leafs every now and again.