I play on Wutai and there are always a bunch of people online.
To be honest - in this game there tends to be a greater mix of people from all over the world on each server and that tends to spread load out fairly evenly. In the evening, Australia time, I have been able to get into some great grind groups with Europeans/Americans and Japanese as well as Oceania players.
Hit Fatigue on my main though so taking the weekend off to recharge anima and recover from fatigue.
FFXIV: Crafty Hallie, Ultros