Mostly about effectivity vs. efficiency in terms of game programming.
Sometimes, when everything seems ready, when your functions fill the pages of your editor, it's lovely to see how many things hide behind it and they don't suck by your definition. I'm satisfied, I'm totally happy. Nothing beats a hot summer day with refreshing rain in the evening and a beautiful, fulfilling function writeup. Throw away your sorrows, watch a wholehearted movie and let the breeze of trust and satisfaction wind up your hair.