Deux extraits d'interviews de Atsuhiro Iwakami (producteur) :
Every words from Homura has meaning.
Story is revolved around a single theme.
Mahou Shoujo is not necessary a hero.
The show is not monster-of-the-week type of show.
Concept of enemies and magic weapons are different from standard.
et de Gen Urobuchi (scénario)
Mahou Shoujo in this show are not united as a single group.
Main element of the story is how everyone from a different standpoint understands each other.
Everything about Homura is mysterious, unlike other characters that their parts and motivation are clear.
Mami knows mechanism of the world to certain degree, so her part is a guide to Madoka and Sayaka.
Madoka and Sayaka will follows the way Mami lead, but at certain point they might choose their own paths.
Urobuchi "this is my first time I have been entrust with a big task that is scenario for all episodes, I feel like I can say I'm an anime scenario writer now (laughs). Can I go ahead from this point is up to "Madoka."
(Via Panpan)