I feel like doing something for a little different. Instead of a zillion attributes, I want to keep it down to a rock-paper-scissors system of three opposing domains, and then have what other systems manifest as individual attributes be an alchemy of those three. It looks like this:
Mind, Body, and Soul are three domains that have various ways of supporting and opposing one another. There are just three attributes that a character possesses: Constitution, Intelligence, and Mana. Other attributes are combinations (or antagonisms) of two more more of the core domains. Charisma requires Mind and Spirit. Perception requires Mind and Body. Magic requires a balance of all three. Each of the domains has an attribute for how developed the character is in that domain. It also has an "energy" that is charged and depleted by character actions.
So in one sense I'm slightly more complex than Either D&D (with 6 attributes) and Fallout (with 7 attributes), but technically I only have 3 "attributes" with 10 "abilities" that naturally fall out of their interaction.
|Intelligence||mind||The footprint of one's soul in the intellectual plane. A person string in intelligence can understand complexity and solve problems.|
|Mana||soul||The footprint of one's soul on the mystical plane. A person strong in mana has the ability to sidestep reality.|
|Constitution||will||The footprint of one's soul on the physical plane. A person strong in will is resistent to disease and injury.|
|Charisma||+mind +will||The ability to communicate ideas and influence others|
|Dexterity||+soul +will||The ability to make ideas reality and perform feats of physical prowess|
|Luck||-mind +soul +will||The ability to manifest low probability in the character's favor|
|Magic||+mind +soul +will||The ability to warp reality|
|Perception||+mind +soul||The ability to pick up non-obvious information from the environment and beyond|
|Savvy||+mind -soul +will||The ability to manipulate rules as well as resist deception|
|Wisdom||+mind +soul -will||The ability to make mental connections between ideas and events|
But here is a twist. There are some attributes that are in opposition:
|Wisdom||body||Strong opinions cloud wisdom|
|Luck||mind||The power of reason tries to eliminate the role of chance|
|Savvy||soul||Superstition makes one pedantically abide by rules in the physical world|
If you are wondering where Strength (from D&D and Fallout both) occurs, I don't treat that as a separate attribute. Checks of strength will be rolled into checks of either Constitution or Dexterity. It's partly down to the design of this RPG. There isn't a lot of combat, and given the technological setting, little need for characters to lift heavy objects.