He got into writing fantasy because he thought the people who read fantasy would read absolutely anything. He wanted to get as much money as possible for as little effort as possible, and since he didn't consider fantasy to be real literature he figured it would be easier than adventure books about rock climbing, which he had written before, because he had to do literally no research. Reading them as an adult it is obvious that they are very lazily written. Every character has a personality that can be boiled down to a single adjective like "grumpy", "sneaky", "funny", or in one very annoying case "having an axe". This lazy writing however means that because the characters never really have much to say about anything things can move at an incredibly fast pace. This is what I liked as a child.