Reading
this thread on RPG.net gave me a serious hankering to start up a Spirit of the Century game. Every player needs to have a character concept in mind, but doesn't define ANY skills, aspects, or stunts before play. Whenever the player wants to use an as-yet-undefined stat or perk, they announce what they're filling in on the character sheet and fill it in.
F'rex, Mal's gotten himself into a brawl -- not that that's ever happened -- and his player declares that Mal has Good-level Fists, then begins to relate, "so there I was, enjoying a quiet Unification Day drink with Zoe and Jayne..." He might also choose to define the Aspect "Your coat is kind of a brownish color..." that he was thinking of.
In theory, it'd key the players into each other's character quirks -- especially Aspects! -- in a fun, organic way. Not sure how well it'd work in practice.
~me
P.S. -- holy Hell I need to go to bed.