I'm actually still on the fence. Right now, it's the first time I'll be playing on a private server anywhere. I played Vanilla Retail all those years back and got up to mid Naxx, and I loved every bit of it. But I don't know, if I want to join on the old PvP server, have a bunch of fun while leveling and get ready to enter AQ40 as it releases, or if I want to go through the whole progression again on the new fresh server. 
  
If anything, the PvE server is at a great spot, which I would like to join on. And although I've played on other PvE servers before, I want to relive Vanilla's open world PvP which I heavily miss. 
  
So it's a tad confusing for me right now. Economy, I'm a bit mixed on. Since the prices of items on the old servers may have stabilized, but may also be incredibly sky high. And I somewhat want to go through MC and BWL normally again (though I heard MC was a push over now. To be fair, it was a push over back in Vanilla retail, just we weren't that good at the time.)