[@vancexentan] Nearly none of that is actually in the OP. It's not that I don't understand the words, I'm just having a hard time deriving a meaningful distinction between them. The difference between "weakness" and "limitation" is not as obvious as obvious as you might think. If my character's quirk is based on line of sight, and doesn't work on something he can't directly see, is that a weakness or a limitation? Or both? It seems redundant.