I have thirty some odd characters,(about six very minor)
I have one overall story - Gabriel's desire to penetrate New York and be Inside the New York story ---
and then I have three smaller stories
* Gabriel's mother arrives and forces him to remember the self he's trying to pretend never existed
* Kenny's father arrives and tries to direct him into a future he does not want
* Olivia's affair with brilliant artist drug addict Zach leads her into creating the greatest city wide art project ever and is her path to leaving New York
So: it seems to me the right way to do this is four storyforms, each using a subset of the characters. It seems when I try to wedge characters who don't really belong into the overall story, it just doesn't feel right.
I like all the stories and want to give bang for the buck, and all of the subplots make sense thematically.
Also, it seems like characters are best served with having at least one characteristic of Purpose, one of Motivation, one of Methodology, and one of Evaluation, or else they're very limited...and most of these characters need roundness.
Comments on characterization assignment strategy. It seems like it's the area where there's not really much guidance on 'the right way to do it.'
I guess you just kind of smoodge it around until you get something that seems right.