>>2785I'm on Aether.
Oceania has the perk of being the "neutral zone" that every region can pay a visit to and play with one another, and the drawback of not having that many players actually living on it.
If you want a more populated server you may have to choose between NA, UK and JP and use Oceania servers to visit and play with people from other regions if you have any.
There are pros and cons but I prefer trying to land myself in more populated zones with more "skilled" players so that I never have to wait too long for dungeons or raids.