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I have noticed that when you arrive at your home town, or at least for me in Qeynos, that you are sent to the banker almost immediately. The banker asks you whether you are an adventurer or an artisan.
I know the difference between an adventurer and an artisan. It also appears that you can level up both a crafting side to your character and an adventurer side to your character. But I do not know if there are limits on this.
So what advantage is there for a crafting character in picking artisan when they are asked this question by the banker?
EDIT: Found the answer for myself. Evidently it makes no difference in how you are able to develop your character.