I would be born into the Earth Kingdom. And to be honest I'm not sure whether I'd be more spiritual or physical. I can be quite volatile and physical, but I am also very thoughtful and not very impulsive person.
Rather than compare to either Aang or Korra, I see a lot of Zuko within myself. Someone who has to work harder than most to succeed, but with great potential.
Ok fine, I guess more physical, but open to the spiritual aspects.