I played Tera for quite a while, but more recently I've been playing Blade & Soul. I really like it and am engrossed in the story, unfortunately though I don't get much time to play it and it doesn't look like I'll ever get to finish the story because the publishers are making it harder and harder to play unless you pay lots of money for booster items (or have bot accounts, which are all over the place ruining the game).
I always seem to reach the end-game and then every mmo just stops there for me. Maybe it's because I play alone as none of my friends play mmo's, so finding a group/guild full of strangers that I can be active with/form a good enough team with is very difficult. (most tend to be American so the time difference is too big)