Its free.
Its fun.
Its addicting.
Need you more reasons to play a game?
But for the long version... its a free MMO, its a bit like WOW, has 3-D, skills (like fighting and magic), life skills (like weaving, tailoring, mining, fishing etc.) that level up through use. And you can play and compose your own songs. And its from Nexon.
Its a bit hard to start out, since... well... NOWHERE does it tell you half of the things you need to know. So prepared to get glanced at awkwardly when you ask how to fight. (tip here, que up the three fighting skills you get early on to make chains instead of using the same skill over and over... the enemies quickly bash the crap out of spammers.) But thankfully the jerk level of the playerbase is low and a lot of people will help you if you ask nicely and tell them you are new.
Oh and you CAN pay for shiney things, thats how they make their money and keep the game going. But its not like you will be a second class citizen if you dont poney up.
Well... now you know why my post count dropped off! Dont worry, I'll try to keep it in moderation. ^_^
Oh and start at 10 years old. You are weaker, but SO much cuter!