I pretty much compare this series to Zelda now, makes sense with the title.
Madoka, Character to be saved, and the title character = Zelda.
Homura, out on a mission to save madoka = Link.
Walpurgis Night and the time repeat = Majora's mask + moon
Kyubei = Happy Mask Salesman. A lot more evil, no less creepy.
Make life what you want it to be.