Well there are a ton of factors at work. One of them is ankle dorsiflexion - you'll tend to jump better using the leg that has the better ankle dorsiflexion. Also, you'll tend to plant first the leg that has better quad strength/that you can pistol squat better onto. It also matters what kind of "hip control" you have on it, how well your body can extend using your arm (you can reach backwards with your right arm planting RL, but planting LR you just go "up" with your right arm which is a different movement).
And so on and so forth.
Personally, I think it's "natural" for right arm people to jump LR simply because that's the natural move going into a shot, and you also stay LR in the defensive stance position so that you can reach with your right arm forward.
So, assuming you're not already pre-programmed, being a right handed guy from an early age should in principle make you a LR planter.