Not a lot of servers are very popular in realms, as most people tend to do keys. Is there any server that tends to have decently full realms during events (such as weekend events or the campaign)?
USWest2, USW, USW3 are servers which are popular during Realm events.
If you are looking for keys
USEast and USSouth
Isnt usw or usw2 the trading server?
I am pretty sure that the official trading server is USWest2
USMW2 almost always has something going on in nexus.
yes but during events, everyone goes to realms to close them. Its not just a trading server, but a active realm closing server.