Final Fantasy XIV: A realm reborn is pretty good I'm playing it right now. It's subscription based but when you buy it you get a month free --- http://i616.photobucket.com/albums/tt243/terrell2483/iaf_zps7e185185.gif http://i616.photobucket.com/albums/tt243/terrell2483/igs_zps14cabeab.gif
Rift is decent, free, and for all that the cash shop sells gear the best stuff is extremely expensive and not the absolute best stuff you can earn from grinding stuff in-game.
EVE Online is good to great depending on your personality and preferences, and after you've been playing the game for a half a year or two you could probably earn enough isk to buy PLEXes effectively making the game "free to play" in a loose sense. --- Stop complaining. I could have done this more painfully. - Dryad from Sacred 2.
Mabinogi, DDO, LotRO, GW2 on a decent server (not sure where you are, but on SoR things are pretty decent), I've heard that Tera is good, Rift if you're into that sort of game. --- RENAMON!! *weeping* YOU HAVEN'T BENT ANYONE OVER THE SINK AND SHOVED A "CHECK THE STICKY* UP THEIR ASS IN MONTHS!! *curls into ball crying*- Cither3000