I may never have to master anything more difficult than thinking, and thinking convincingly, like multiple characters. It’s not just a matter of the word choices and rhythms of their dialogue (although it includes that). And it’s not just a matter of the outward manifestations of their natures — gender, style of dress, and so on (although it includes that, too). It’s a matter of looking at the world in a way shared by no other characters in the same scene and/or book.
This makes sense, right? People born at different times, to different families, subject to different economic pressures, attending different schools — all that: they can’t possibly regard and respond to a given event in exactly the same way, from events small (a single question, even a single word like Why?) to enormous (the impending end of the universe).
All these considerations — not just the way someone talks but his/her psychological/emotional stance in relationship to events and other characters — constitute what I think of when I think of voice. And it’s damned hard for me to understand, let alone work with.
So when I set out on the work-in-progress now called Seems to Fit, well, naturally I’d give it a half-dozen main characters and a gaggle of lesser ones. (Ha. Joke’s on me, isn’t it?)