It is my understanding that our starting nation is determined by our first chosen class.
If 1) I have the ability to change my class on the fly by simply equipping a different item,
and 2) If I am unable to ever change my nation,
wouldn't it stand to reason that I should pick a class, at character creation, that is tied to my chosen nation and reequip to my chosen class once I'm in the game proper?
I prefer a mage class, but I have no desire to play/live as a part of Gridania/Order of the Twin Adder.