Taking me as an example, when I was a child, I liked to read pocket books, at that time mainly because I didn't have too much entertainment in the countryside, and those story books were particularly interesting, mainly because of my interest.
Bigger time, that is, junior high and high school, in general, reading extracurricular books is not particularly much, because the study of busy, weekend and so on have to help the family to do farm work, so at that time like to read, but read less, favoring novels, the reason for its interest, but also have to study, after the work of the relaxation of the pastime.
To the time of the university, it is the peak of reading, because there is time and resources. This time to read the subject matter is more, what masterpieces, academic extension of reading and so on. This time also participated in some book clubs, not only can read, but also can share some of their reading experience, notes and so on. The reason for reading at this stage is mainly interest and fulfillment.
After graduation, I almost gave up reading at the beginning, mainly because I was busy and tired at work, and I just wanted to sleep or go out for a wave when I had time. ...... Until in the work and talk to people encountered some "ignorance, lack of ability", only began to pick up books. At this stage, the books you read are more purposeful, and you read whatever you are lacking, mainly to improve yourself. At this time, the main reason is demand.
Looking at my reading history, I like to read for the reason that the main reason is interest, interest in the basis of habit, coupled with the demand for reading will naturally adhere to.