I've played on Ragnarok Online on 3 different servers, and so far, I could say, Dreamer RO is the best one yet. There are lots of fun-filled events even for super busy people like me (I can only get online like a couple hours, 3x a week). Though I am not able to join WOE, I am able to enjoy the game through the mini pvp events. Players are really nice and helpful, both in game and in forums. I highly recommend people to get on this server :D