What kind of Android games do people really like?

I am a Game Developer and i have a Question in my mind!! what kind of Games do people really like ?? what they really want in a game?? I have been working in this industry for years now and observed that most of the people are unsatisfied with the product as they were expecting something else!! please give me your points like what kind of games do u like and expect from developers to make!! And since i am a developer , i might try to get your ideas in my Game as well!!