Ok, to clarify things further, every individual player have each of those that are mentioned above in him/her. (there are more than 4 kinds actually but these 4 are the basic ones) Meaning one can kill, explore, achieve goals and socialize. Now the question is which one is dominant with each player? In my case, it is 73%Explorer > 73%Achiever > 40%Socializer > 27%Killer or EASK or AESK. As of now, i'm one of the Explorers/Achievers who enjoys exploring my char's strength, pushing it to it's limit. Now how would i do that? Well by "achieving" goals in quests, "killing" at pvp and "socializing" to gain other's insight. I hope everyone got my point. :D