On writing a series

My favorite influences, of the moment, for series that do a good job juggling large casts, humor, angst/tragedy, romance, a teen angle, and a strong supernatural element: the Harry Potter books, the Buffy TV series, and the Avatar: the Last Airbender series.

Why I mention this:
This Greek myth series has been giving me a writing experience I've rarely had: that of handling a large cast, over a sprawling amount of time, with lots of subplots and embedded smaller stories. (Thus "The Chrysomelia...