only good ones atm are World of Warcraft or guild wars. all the free korean ones are all crap. some have decent graphics like runes of magic but gameplay in every one of them is exactly the same point and click with not much freedom, not to mention the grinding to level and constant server issues with most of them.
runescape sucks
knight online sucks
conquer online sucks
runes of magic sucks
warrior epic sucks
maple story sucks
fairyland sucks
you get my point....played em all... /uninstalled each one after about 30mins-1hr of playing. A few others too but cant think of them. Just stay away from the free to play ones basically unless you can stand lots of headaches and boredom. gl hf dont get addicted