Since now I'm on vacation, I started a new MMO which I found vey interesting: Atlantica Online. Good graphics (though I'm not so picky about graphics), actually features a plot (most MMOs don't), has a different gameplay (turn-based AND you have up to 8 mercenaries from different classes, so it is more strategical - check it, I can't really explain) and the game was developed to make people bond. So, in my book, SOLID GAME.
Really, best way to understand it is to take a look at it. BTW, it's F2P (and rather well supported).