Who here has a grudge? Come on, be honest. You know you have at least one you've developed in this game at some point. Even a minor one, something you've stuffed in the deep recesses of your subconscious never to see the light of day.
I know I have grudges and I know a lot of other people who do as well. However, something I realized (not just acknowledged or accepted as the norm, but realized) the other day in a discussion with a few friends of mine is not only the prevalence of,