I was initially interested in Gridania. Now I am not sure, swayed to Ul'dah. It felt like there was less info about Gridania, the description seemed general. I can def see how Mason would fit in nicely in Ul'dah, even though I generally dislike desert cities. The starting city would be where he grew up, as an adult he is a traveler anyway so the city only matters in terms of background to me.
I’m the bullies you hate, that you became.