Dragonheir Scion (Fighter): Yes, this archetype is poorly written, what with the improper bonus feat levels and non-scaling arcane strike, but the flavor is great, it left weapon training intact, and it allowed for neat demoralizing setups.
Scaled Fist (Monk): I like dragons ok? Also allowing monks an alternative to wisdom is cool, and opened up the class to other races that normally wouldn't be good for monks
Warrior of the Holy Light (Paladin): a Paladin so Holy that their very presence inspires allies to fight harder and heals the sick and the wounded. That's Awesome.
Fire Bomber (Alchemist): Some people just want to watch the world burn. (If the new Iconic Alchemist is not one of these I will be severely disappointed)
Channeler Of The Unknown (Cleric): I've wanted an offensive Channel Energy Cleric to work. SO. BADLY. This archetype is the closest we've got to making it viable by allowing them to harm anything, with the extra bonus of giving you a deeper pool of daily Domain Spells to work with.