Well, I'm in the same situation as the OP, the difference is that i never played a p2p before.
Aion itself seems OK, but so did WAR, remember when everybody was so like... WAR = WOW killer? and hey it's the best game evahh ? Well, it didn't happen.
Well, at least OP can play WoW, and in my situation I don't really have any p2p to join, (it's dumb to start playing wow now, FFXI seems kinda old, AoC doesn't seem to have a good population, WAR same thing, and hmm.... EVE it is just impossible to be "high level" in that game now due to it's system)
Can't really think of any others.
Oh and btw, a little off-topic but it is very important for me to know this.
A few days ago i saw a Youtube review of Aion, and the guy said something about the collectors edition had more flight time or something, and according to him, it had an advantage in pvp.
Is that right? I mean..... if I am going to play a p2p then I want equality, otherwise I would just play a f2p and get pwned by cash shoppers...
Oh, and my guess.... I think Aion will fail, nothing against the game really, it seems good, I just think it will end up like WAR.