Got a Druid to 37, a few alts to teens. Its been fun, but I doubt I'll play past the point when Druids are no longer needed (i.e., PoP), which is looking to be the beginning of November. Confusing jumble of expectations here, lots of people wanting to play the "classic" game for a good long while, but little chance of that since its also a race for uber-guilds to unlock the expansions. Levelling is SO easy compared to the old days, its ridiculous. Serious twinkage not possible yet, though, so it still has a bit of the feel of how it was.
No one will stay here long unless they're (1) in one of the guilds unlocking the progression, or (2) looking to start over for the long haul on a new server. The "classic" game experience will be gone in a month or two.