Obviously my opinion's long since changed after playing it for a full year, but I wanted to post the old review here to share with others, and to leave an actual review of Onigiri on the forums:
The game's mechanics are pretty easy to learn, and are simple to use. There aren't any classes in the traditional sense, but what you choose does affect your base stats, i.e. choosing to be a Power type will start you off with a higher attack and health than choosing to be a Daring type, which focuses on critical chances.
With that being said, players can use any weapon they come across, each with their own set of skills, despite their class type, and can use up to four weapons simultaneously. However, those whose affinity with a certain weapon type, such as staffs and wands, is low aren't going to be as good with them as someone who chose one of the two classes which specialize in them.
The game starts off easy enough, and can be fair with its leveling system. However, the game can be nastily difficult too, with steep level jumps from dungeon to dungeon, and area to area. It is all too common for players to find themselves in an area where the dungeons are 20-30 levels higher than they are, and it becomes merciless.
Enemies can also be unfair, especially if you're surrounded by them. To offset this, players are encouraged to start parties with other players, and help each other through the game.
The game is very linear, and you don't have much freedom to go anywhere, and certain places are cut off from you completely until you complete the quest chain to get to that area. The game itself is heavily story driven, and the partners you get along the way all have their own personalities, though they are just pretty much stereotypes of what you'll see in Anime, but they're amusing to interact with, and watch.
Character customization is limited to some body types, pre-made hairstyles, eye designs, and clothing, which is separated into four parts: Head, torso, arms, and legs, though you can mix and match the clothing you get. There's also four voices you can choose from.
Despite these flaws, Onigiri is a solid MMO, and can be fun to play.