Private servers you say? I'll check them out, but isn't that not allowed here? But if we can continue talk about this, I'd like to ask. Which one is the best and also doesn't make me jump through hoops just to register, download, and play it?
Dragon Oath was alright... Aion is pay to play but I hear good things. If you're looking for a good game to play - check out either Dragonica Online or Atlantica Online if you haven't played them.
I'm not so sure about Dragon Oath, but if I recall there's a lot of hype about AION. Not too sure if the hype is gonna be good for it or not. It was already mentioned that AION is not too different from your 3D MMO. I might give it a shot but until then, I'll stick to Luminary.