For me, the success of a game is measured by how it makes me feel. Most times, I play to get away from the real world for a bit. I want to have FUN, just like many other gamers. And what is the point of a game that you don’t find amusing, reaffirming, challenging or worthwhile? I haven’t run into many games that make me feel terrible, though some that are releasing soon are sure to disappoint (speaking of Tera here), however for the most part, I’ve been lucky to experience games that keep me coming back and yearning for that release from the real world that allows me to challenge my point of view. Sometimes, that draw to bring a player back is a marketing ploy. Take WoW for instance. By never allowing the player to win, to gain complete fulfillment, they assure that the players will continue to come back. It’s like dangling a carrot in front of a horse, and in the end it benefits both parties provided self-control is present.