Practicing while seated
I've been playing classical guitar for a long time, and i play the electric guitar in the same position, on the left leg. For me there's no doubt... this is the most correct position for playing and i try to get the same position when i play standing up. First of all, when you are seated, you won't have your left leg in the way of your left arm. This position is also far more confortable for the right arm and shoulder. When you play standing up, if you play with your guitar quite high, like you do when you are seated, you won't have your left wirst bent in unnatural way + off course the position will be very similar to the one you are using to practice.