I did get disconcerted the first time I had F become really vicious; mostly because I was enjoying it!

I think we have to have some connection with our characters, however awful they are, or else they are insubstantial. At least, we do if we aren't geniuses. And evil is often something quite normal twisted just a little bit or missing a small but key element. At least, that's the evil I tend to think is more interesting to write and read about.

I actually have trouble writing aspects of S because he isn't a saint, and it's too easy to write him as some sort of Santa Claus figure. Which is sort of the opposite problem.