I'm new to Jeet Kune Do and Bruce's ideas. I come from a Choy Lay Fut background. In that style, we were taught to use a southpaw stance. In doing some reading about JKD, I see that it too uses a southpaw position. I may be answering my own question in assuming one can use either left or right-forward stance as I'm sure Bruce would say to not limit yourself to either side.
I personally am left-handed, so naturally the use of my left extremities are more natural and powerful. (ie: straight lead, etc)
you have the side of your body that is your donemt forward so you hit harder than normal so your jab is has hard as your cross trine both sides the same so if you have to defend your self you will be fine and do it from the nurtal stance as well as most fights start when you dont now there are coming at you
try to make both sides very strong, and pretty much equal, you will probably need to switch at some part. I am also left handed, and as I'm learning JKD, i try to learn southpaw and right handed. Which i hard, but worth it.
Naturally, Left handers find it easier to adapt to anything right handed, because this world is made for right-handers, and even things like door handles are designed for right handed people.
Your most coordinated arm and leg should ideally be forward since it's faster and you get your straight lead punch and kick out there faster. The straight lead is the backbone of JKD. However, you should always train both sides. It's not only good physically for avoiding muscular imbalances, but also, in a real fight, you can't choose what side you can fight on. In real life, most fights start as a shoving match or when someone grabs you. Wherever he's positioned, you want to be able to take care of him. If you only train one side, you're screwed if he's in the wrong position.
A left lead has it's advantages, technical, as well as tactical. However, it is best not to limit yourself to a stance. You have to be able to hit on the move, from any direction or angle.
In a left lead you are limited to jabbing with your left hand, and vice-versa. Double stick work tends to develop lateral movement, teaching you to move without being in a stance, so that you can enter from any angle, regardless of what foot is forward.
Traditionally right handers use a left lead, and left handers use a right lead. For a tactical advantage, if you are going to use a stance reverse the tradition. If you are left handed use a left lead. This makes your power hand faster by putting it closer to the opponent, therefore reducing the amount of distance it has to travel. It also makes your weaker hand more powerfull by increasing the distance it has to travel by putting it in the back, as opposed to the front. The increased distance allows the weaker arm to gain more momentem, which increases power.
In all reality, it is circumstance that dictates what lead (righr or left) is better at the moment. That is why it is best to be neutral and move laterally. It allows you to create whatever lead you want through footwork (triangles from Kali) and body mechanics.
Double stick work, and Mass attack drills develop this ability / attribute.
Stances are a good referance point to learn from, but don't limit youself to them.