Tried all their shit, Atlantica was the only one I spent time on because I enjoyed the combat, but the complete linearity, obscene cost of powerful items (in RL cash), and stupidly convoluted menus kept me from playing very long.
Dragon's Nest is just terrible so far. I've encountered more bugs, crashes, and disconnects from this game in half an afternoon of trying to get it to work than I did in my entire 6 month tenure in Atlantica.
I mean, I don't know if it's a good or bad game, I just know the company is somewhat half-assed about supporting most of its games and turns them into cash cows at the expense of the community. That on top of the fact I can't enter the damn contest because the game doesn't work has me a little ornery.