If you can, shoot for Balmung. If you want a house, shoot anywhere but Balmung and Mateus.

I've met some of the nicest and most considerate players on Balmung, and with a character on Ultros (and witnessing the sham they call RP) trust me, it'll be a whole world different and better for it. As for world visit, it's also instant. I have never had to wait to get on Mateus or Balmung. Logging in, the strongest walls will happen on expansion launch. At most a queue of like 10-29 people on a Saturday night.