There's only one MMO remotely worth playing: EVE Online.
Now, a little rant. Feel free to ignore....
That being said I don't understand why anyone would want to waste their money on MMOS. The very concept is ridiculous and dumb.
1)MMOs are designed such that you can never "win" or truly "get somewhere" there is always that unachievable "true leetness" factor floating somewhere like a dream you are striving for but you can never get there. There will always be people better than you in any MMO. The people may be playing(correction, grinding) much more than you, or they may simply be spoiled rich with nowhere to spend their money that comes too easy to them, so they will spend it to buy the best items, gear, etc, and these folks will still ultimately pwn you in PvP and laugh at you calling you a "gay ass n00b". You may argue, that you are playing "just for fun" and you dont care if you'll get anywhere in the MMO that you are playing. But who are we kidding here?! If you didn't want to get somewhere, you'd quit a long time ago.
2)MMOs are designed to suck you in such that you waste your whole day, maybe even your whole life playing. Many quests, raids, teamups work in such a way where you cannot "save" before you finish a task, forcing you to play several hours at a time.
3)It's just STUPID to pay $15 every month as a "fee" for something you cannot OWN forever. Think about it.... Imagine... how many games you can buy on STEAM for $15. and these are not just some shitty games we are talking about here. There are many GOOD games available at this price. These games are there to stay with you FOREVER offering countless hours of entertainment until you burn out. And you may come back to them in the future anytime you wish and play for FREE. Also, if you multiply $15 by 12 months in a year you get $180!!!! That's a brand new mid to high end video card or cpu or a spacious hard drive every year! I don't know about you, but something like this is a hell of a lot more important to me than paying an MMO. These computer parts I mentioned will allow me to enjoy games and more for several years, while you can enjoy your MMO for only one year at the same price. This same $180 can go toward a gym membership, a new bike, plenty of food, or clothing. Things much more important than an mmo that you cannot even "keep".
4)You cannot sell your MMO account. To me this idea alone is ludicrous. Isn't it "I" that paid the money to the subscription? Isn't it I that put months, maybe years of hard work into that account? Why then should the game company have full rights to it? I understand how the sale of individual virtual items should be illegal, but the sale of accounts should be allowed.
Sadly I cannot escape from EVE Online now when I have an account. I cannot sell the account and I cannot stop playing it either because it's "there" and I cannot just ignore it and pretend it's not there. I canceled my subscription, but I know I'll come back to this damned game again at some point. That being said I have sworn never to start another MMO ever again unless I can sell the account.