I really enjoy working in genre series, because you really have to create the characters.
My first job was to run a concessions cart. Later, I found a position at the Pacific Film Archive. Thus began a long series of jobs, each one slightly better than the last, that continued for a decade, until I sold my first novel, and still goes on, even now.
Developing a series is a next step for me.
Well, I know that I'll never forget that, but also I won't forget the hundreds of people who sent me letters, telegrams, and postcards during that World Series. There wasn't a single nasty message. Everybody tried to say something nice.
One of the things I've found most challenging about writing a multibook series is keeping it fresh and evolving while still delivering the familiarity that keeps longtime fans devoted to the characters and story world.