Tera is in closed beta atm for NA and you can sign up at
http://tera.enmasse.com or you can pre-order it and get guaranteed into all the betas and early access!
I'll keep it short Tera is an action based MMO in which you actually have to aim your skills and dodge and block attacks in real time, no just hitting 1-2-3 the focus is twitch play with fast reflexes and quick action. The game is beautifully done, it is kind of a mix between realistic and cell-shaded in a way that I love. The races and classes have lots of customization to them and the classes are a little more unique than most MMOs (like what I am a lancer which is a tank that uses a lance and a big shield to literally stand in front and take the blows while the team hides behind him). The game also has no factions so the PVP is going to be more focused on guilds fighting and FFA groups forming than alliance vs horde 1 side always wins bullstuff most MMOs have.
Here is a pic of my guy, he may be a little intimidating I made him scary on purpose because I wanted to inspire fear in my enemies.

His name is hugglewuggles which is a name I also picked to inspire fear in my enemies.
Here I am war dancing to let everyone know not to forget with me, most of them started dancing back which makes me believe they were so scared they decided to copy me in an effort to please me.

And here I assert my dominance by beating up the toughest guy on the island, the dreaded king pigling.

Did I mention boobs jiggle in this game?