allright. lets clear something up. its not really black and white what a dominant leg is it seems. the more coordinated leg is usually the right leg, you have more control with that leg. the stronger leg is usually the left, its the leg you put your weight on when your right leg is doing a task. people also usually jump from their left leg cause its stronger. (like some of you mentioned you did)
now some people define dominant leg as the stronger while others define its as the more coordinated one.
so people generally balance on their left leg cause its stronger. but kick with their right cause its more accurate.
now here comes skateboarding. both ways work. balance on your stronger/more stable left leg when skating regular. or flick with your more coordinated right foot when skating goofy. pretty sure this will all even out after skating for a while anyway.
"A recent study with more than 12,000 participants found that just like for handedness, most people have a right-sided preference (Tran and Voracek, 2016). Overall, there were 61.6 percent right-footers, 8.2 percent left-footers, and 30.2 percent mixed-footers. Thus, the numbers of left-handers and left-footers are comparable. However, there is a much higher number of people who are mixed-footed than mixed-handed or ambidextrous. This is likely caused by the fact that we have to choose a hand for writing, but it is not as important to have a preferred foot to carry out foot-specific activities in everyday life."
"Since this left leg is used for stability, the right leg supports more fine motor coordination, such as providing the right “touch” when striking a soccer ball. While the biggest role in the development of this lateral dominance is repetition, other major reasons are not fully agreed upon. Perhaps the most likely theory is that the left cerebral hemisphere, or left half of the brain, controls the right side of the body. This left hemisphere is generally dominant, giving the right side of the body better neuromuscular control. We often think of movement purely in terms of muscles and joints (muscular), but the body is a system and movement is driven by the brain (neuro)."