I actually went yesterday to take a look and here's my impression

Ranking:
1. Limsa Lominsa - Nothing can beat the view, beach-parties and sunsets that can happen there, paired with a nice mediterranean feeling and the variety of places - either buy a small house right inside the city center, down at the beach or somewhat outside of the district center for a little more quiet spaces.
2. Ul'dah - I was surprised how they kept the circular theme of the main city of Ul'dah which is a huge plus. Currently though it looks rather empty and there are a lot of paths it's rather easy to get lost lol. Surely this will look like an amazing city district if build fully but that'll probably be the case for all 3 districts.
3. Gridania - Not gonna lie, the area is gorgeous. For all nature lovers and forest dwellers, this is the place to go. Feels extremely cozy and those colorful paths are just beautiful.

What's your Grand Company?
Immortal Flames (currently)