I don't have any old school ass-kickers and dungeon crawlers in my crew (much to my dismay, sometimes

) but it wasn't my intention to give them mechanical benefits for points (although I sometime give +2s for actions that make everyone on the table go "OMG HAWT!")
I sadely can't accept giving bonus XP. I'm pretty strict when it comes to XP, and one thing I really don't want is the PCs being of different levels at any point (makes things confusing for some, and others will be jealous and sad, and happiness is mandatory at my table).
So here's what I've come up with yet.
--------------------------------------------------
Basic system.
Every session, you give every players up to 5 free "plot points". They can use this to change the gameworld to their advantage by going "Well, DM, you didn't say there WASN'T a ladder!"
Use one point : Change a minor detail in a RP scene (Example : "The guy now has a sweet mustache!")
Use 2 points : Change a minor detail in a fight scene, as long as it makes sense (Ex : "Well, we're in a library, there should be some ladders around those giant bookcases!")
Use 3 points : Add a piece of plausible and useful(for the PCs) to a NPC's background (Ex : "Well yeah I know him! I saved is life in the Last War!")
Use 4 points : Add a defining feature to the battlefield, as long as it's logical. This should be defined at the begining of the combat. (EX : "This church could have a pool in the middle for ceremonies and whatnot. And it's most likely holy water!")
Use 5 points : Call a defining feature about a NPC. ("Yeah... He's the only one who witnessed my wife's death.")
Special variant : The super plot point.
Every character recieves one super-plot point (of doom) every (Long time, I'm thinking every tier). They can use that to create something completely and utterly far-fetched, ridiculously continuity-breaking and random. For example : "Euhm... He's my father! And you! You're my sister now!"
The number of points granted per/game would vary depending on the type of game you play. Less for gritty games, and more for beer and pretzel games. The super-plot point (of doom) should only be used at your own risks.
Basically, the mechanic allows player to put their background into action themselves, giving us less preparation! Isn't it wonderful?
Comments? Ideas? Insults? Hamsters?
P.S. Yes, I'm so totally a commie gamer

FROM QUEBEC! The commie invasion will come directly from the north... the french north... fear...
-----------------------------------------------