I was going to do Castle Falkenstein second however that is bogged down in technical issues… (there is a reason why in this case and I assure you this is interesting). However I decided that it would be interesting to look at a system that shows your skill as something that really matters.
FATE is one of the systems that uses the Fudge Dice (+/0/-). In fact it purely uses 4 of them providing a result of between 4 and -4.
It is the combination of these 4 dice that makes an interesting way of allowing the player to know who they are within the story.