Status: Almost finished with edits for second book
My series started as one book in 2004 about a young woman with seven brothers who were a little too interested in policing her love life. By the time I was three-quarters finished with the first story, the brothers were demanding--as brothers sometimes do--their own stories. And since eight didn't seem like a good number for a series, I decided their widowed adoptive mother should have her own story to round out the series.
One thing I appreciate with a series of books is once the basic setting is done and relationships between the characters are established, the writing comes fairly easily. That doesn't mean I don't have to put fingers to keyboard to get the words down. However, the characters are like family. I know their basic personalities and how they will react to situations, and they reveal secrets of their pasts and emotions perhaps even they didn't know they carried inside as their stories unfold.
In other words, the characters pretty much write themselves.
For other writers, though this may seem unfair, I've also had characters who revealed themselves one grudging trait at at time. How do your characters come together? Do they spring fully formed from your mind or take time to develop? Which ones became your favorites--the ones that flowed into the story or those you had to dig deep to find?