One thing that I picked up from reading other writers is that 1) don't write too many and 2) make each character in the group as different from the others as possible, for clarity between people and making each one interesting. I'm also guilty of not being able to do this very well, especially in one of my series where I inevitably have a main character that has a different set of people around her in each book... In your opinion, how many characters in a book/series are too many? How easy do you find it to make your characters separate from each other and how do you go about making sure they are as diverse as possible? I think I had some more questions but I've forgotten them for the moment.