Lefty regs here. As with others, I'm mixed; write lefty, throw righty, etc. I think we've had this thread before. Still seems pretty un-correlated.
I guess I'd say I'm more right leg dominant. Tre flips do feel much more comfortable than kickflips, but I always figured that's due to the classic tradition of leaving the kickflip to collect rust once you start learning more complex tricks. My switch game feels pretty comfortable, just haven't put enough time into it at all. Switch flips are actually popped higher and way more level, it's just that my right foot is less flexible, doesn't drag as easily so the flip is usually too slow/incomplete.
Edit: Also started mongo, learned to push regs once I read enough mongo hate in the mags, but now have a pretty comfy switch push. Another thing I like is that I can throw the board down with either hand. I saw a thread a couple weeks ago talking about that and I guess some people aren't comfortable with throwing it down with certain hands? I like that I can hold my board with either hand and throw down from there. Though, if I throw down with my right, my back foot tends to get on the board first which can give anyone watching closely a glimpse into my dark mongo past.