Near misses and other hijinks. All of these can be yours for the price of one trait! I've always wanted to play a luck based character but I've not run into a system that can adequately model what I want to do. Rerolls are nice, added bonuses are nice, but it just doesn't create that intangible feeling of having a character who is lucky. Unless you go by the astronomer definition of lucky. ie, if you weren't lucky then it would have been something even worse happening.