Firestarter intrigues me the most, so that's where I canst my vote! Like Morgan, I love the idea of the miracle machines, and I always love the behind-the-scene revelations that come with that sort of thing-- particularly with religion, and with characters raised in religion/certain societies, because then you get such lovely twisty opportunities for realization and growth and struggling with long-held beliefs and such.

Also, snarky animal avatars made of fire, awesome.