When the servers finally came up for preselect today and the flood of players arrived, one thing became clear pretty quick: NCSoft means business when it comes to server balance. Very quickly many of the servers were “full” on the Asmodian side. Asmo was locked out on nearly every server after just a few minutes.
What was awesome though, is that it was not a complete lock out. As more Elyos characters were created, more Asmo slots opened up. If you were trying to roll an Asmo and failed due to the lock, you could continue trying and grab one of the slots as they opened.
Many people did not like this and understandbly so, but I think it was a fantastic decision for the long run health of Aion. Many people probably remember all to well how unbalanced the WAR servers were on release. The unbalanced server population in WAR greatly contributed to the decline of the game. It is something that, a year later, they have still not recovered from.
NCSoft is taking a hardline approach to keeping the servers balanced and, in the long run, I think it will pay off. Balance is vitally important for a PvP game and NCSoft is not going to mess around with it.
If you are not able to create your chosen race on any given server, continue trying until a slot opens up. This maybe frustrating but you will thank them in the long run.