Dragonfall seems to be the most populated server out of all the PvE servers -- As stated above, the PvP rule set seems fairly undesirable at the moment. I made characters on all of the other servers and throughout the OBT I continued to check on how many guilds had been created on each server (viewable through the activities menu) and how many players there were total from the first few pages of guilds. This is obviously a rough estimate but, Dragonfall had almost twice as many guilds (~500) compared to the next highest PvE server.

I realize that it was an "open" beta meaning anyone and their mother could create an account and start a guild but, to further reinforce my point, Dragonfall (as far as I know) is the only PvE server that has already had it's max population cap adjusted to accept more players (I cannot for the life of me find the post where EME mentioned this) and it is once again showing as "High" on the server status page. The only servers that seem to have a higher population than Dragonfall are the PvP servers and they are crazy packed with people and drama.

Neither Svper, Crum, nor myself will be starting any type of guild as I'm sure we make better followers than leaders at this point but, we are looking to join a not-so-casual-and-harder-core type of guild with real focus on end game content and the political system. We have yet to apply for any guild but we've had our eyes on a few different ones.