Hmm, I don't even have many games. If I prefer one game more than others, it has to be good. For me, game is good if I'm addicted to it. And if I'm addicted to it, then it has to be fun. At now,
War Rock is addicting game.
1.) It is free!
2.) It is multiplayer-game
Those are the reasons why I have it. It's just so fun to play with other dudes around the world. So, the reason what makes game fun, is good multiplayer mode. I like to play CC and other games sometimes, but really, War Rock is the only one that really has fun in it.