http://outspark.com/fiesta
Okay, this game really took me by surprise. It's a new free MMO by a little-known company called Outspark. At first glance, it appears to be just another generic Korean MMO, but it's actually much better than that.
First of all, you should know that this is just the BETA version. Sure, it's a little glitchy, but for a beta, it's amazing. The game has a really cutesy style that is very very distinctly anime influenced, and is also reminescent of games like Flyff. There's some very interesting play mechanics involved. To rest, you actually go inside a little mushroom house that appears wherever you are. (and it's customizable, which is a nice little bonus feature) There's a very unique and rewarding upgrade system, a good exp system that isn't too frustrating, quite a few quests to do with decent rewards, and you can even ride from place to place on flying "stick horses."
Oh, and did I mention that the music is AMAZING? Because it is. It's the best music I've heard in any MMO, hands down. (though the town tune does get a bit aggravating after a while)
You get your basic classes with this. Fighter, archer, cleric, and mage. It's still the beta, though, so who knows what job classes and second tier jobs may open up?
Anyway, what I'm getting at is that this game is actually really fun. I've played a lot of free MMOs before, and they usually lose my interest within the first evening of playing, but I've been playing Fiesta for a good 7 hours or so, now, and I only like it more as I keep playing. So far there aren't any cheap limitations for not paying for the game (though there will be a cash shop opening soon, so I imagine it will work kind of like Flyff)
Oh yeah, there's also a nice variety of physical expressions, and they're all animated very nicely. And the monsters are really interesting, too. The whole game is very nicely made and is really smooth and good looking. And I don't know why I'm even saying all this. Just go check it out yourself! I highly recommend it.
To MSP: Think of it like a less grindy, more adventuresome version of Flyff. Just the beta version is better than Flyff's like, what, nth version?
*Edits again* Oh yeah, and already there's a whole bunch of fairly interesting events. And there's this cool party quest thing where you sign up and do these group quests. It looks really fun.