In an effort to really help me clarify my ideas, I'm going to answer the Power 19, starting with The Big Three.
1.) What is your game about?
Creating a group of characters with both group and individual goals then having the characters attempt to complete those goals.
2.) What do the characters do?
Attempt to complete their goals through whatever means they deem acceptable.
3.) What do the players (including the GM if there is one) do?
The group (including the GM):
Pick a setting, create a group concept and goals for the group.
Create characters, with their own individual goals, that fit within the group concept. The players then direct their characters through the game world while they attempt to complete their goals. Each player can have multiple characters in a group but can only have one active character at a time during play.
Create the game world with assistance from the players and game materials. Determine the difficulties of attempted skill checks with assistance from the game guidelines. Portray entities encountered during play.