While the AW rules state that the game can be run with "3 or more players, including you [the MC]" I am curious if anyone has run an AW campaign with just two players and an MC.
I ran a game with two players, with each of them running a primary character and a secondary. After two or three sessions we ended the game because we felt it wasn't possible to generate the requisite amount of emotional interaction between player characters. The two primary PCs (a Hocus and a Chopper) maintained an alliance in which the Chopper's gang provided security for the Hocus' cult in return for food and other necessities, any real conflict between the two of them would have made running the game extremely difficult.
While emotional interaction between the player characters and various NPCs brought a lot of life to the game, interactions between primary and secondary PCs seemed contrived, as if the players were running NPCs. Neither player wanted to run his primary and secondary characters as allies, because that would subtract much of the ambient mistrust that makes the game so interesting. Putting them in conflict with each other would create a bizarre faux drama.
Has anyone had success running an Apocalypse World campaign with just two players and an MC? If so, what techniques did you use to avoid the problems our group encountered?