Blade & Soul a fantastic MMORPG from Korea that's heavily influenced by oriental themes, mythology, and martial arts. The game's art style is based off of Hyung-Tae Kim's work (I'm not sure if you've heard of him, but he's well-known in Korea for his art in manhwa); the over world and character design is absolutely astonishing. Gameplay-wise, it's very fun and diverse in terms of what classes and races you can choose from, how you can make your character look, how you move around and/or battle in the world, and overall what you can do in the game (especially with friends to experience the game with).
I'm not sure if my explanation is at all lacking, but here's a gameplay video so you can see for yourself just what kind of game it is: http://www.youtube.com/watch?v=27A--y4Jv3U
And this is the official site for USA: http://us.bladeandsoul.com/en/game-overview/