Hyperion is nice, it's got everything and the economy is good.

I don't recommend excalibur. Stuff is expensive and I dare say there's TOO MANY people, also if you ever get friends who start playing there's no way they'll ever get on that server..

Hyperion has just the right amount imo and character creation is always open in the morning. Also party finder is very active at all parts of the day for anything you could need.