Clever dice mechanics

[CAFRedblade]

I like Dragon Age's d6 system of maneuvers based on the Dragon Die results, giving little added effects to the player on hits.

 

[Nine Hands]

I designed a game system that whenever you rolled doubles on the dice (2d6), you got a point of XP in the skill you rolled. Those free XP counted for the purposes of leveling up the skill.

It was a nice organic system for character growth.