Every one likes different things, places, people, colors, flowers etc. I am interested to know how this mechanism is developed in individuals. If we suppose that it is started from home. Then why siblings have different interests. If it is from society then living in same society still siblings have different interests. Like if two brothers are class fellows too and live in same people. still they will have different interests. 
How liking and disliking mechanism is developed?
social psychology;learning;measurement;developmental psychology