If you're the solo player type, doesn't matter which server. But if you like group activities; questing, raiding, PVPing, then go oceanic. More people on during our time. I spent 2 years in a US EST server, they're 12hrs behind us, so I have to wake up early mornings to raid back then. Was a great experience game-wise, but hurts your daily life (if you plan to have/already have a daily life)