I'm gearing up for a new campaign and have been thinking of something similar, inspired by Riddle of Steel's spiritual attributes. They can add an action point to a roll (somewhat equivalent to a dice for those that don't have Unearthed Arcana) when the outcome was related to "their background". (Having a written character background is something I usually require). Yes, that's a vague idea on my part and possibly could lead to game-interrupting discussions.Am Currently Playing with Action Point, which give the PC's some control over the fical fate of dice, but really no involvement besides recognizing that it is a "Oh Shit" moment.
Was going to have the Players Name/Traitorize their Action Points, and have to add some rationalization to using them. ( The Goal here is for the player to make an effort that is consistant with how they concieved the character [The Naming is their own] and consistant with it [The Rationalization] ) More or less any effort is gonna make it ( probably abitrated by group with Dm Veto ) but it takes a bit more effort than Oh Noes it's the Save or Die , Roll dem extra D6's
Example Luke the Ranger, has some Action Points at Level 1, Things he named Masterful Chef, Awesomeness, and Crackshot ( Presumably there being a rule against duplicates) Things Go Sour, and he wants to use his Action Points ( for the mechanical bonus) and is now aiding consistancy threw his rationalization?
I think you've got a good idea. I've only played Riddle of Steel once, but the spiritual attributes seemed to be a mechanic that focused players on how their characters were involved in the story.