Why do we do what we do?

What makes a task more complicated is it's direct dependency on the complexity of coordination that is involved. The higher the complexity, the higher the higher the chances of failure and higher the joy of success. How often do we feel the immense joy of snatching the victory from the mouth of failure, however insignificant it might be!!
Also, how many of us enjoy being in this situation? And to add more, how often do we want to be in this situation? Sure, these are the kind of things that act as steroids to stress level, so whats the attaction? These are the questions I've been asking and there are never ever any answers. I've been observing a small group that day-in and out face these situations, do not make any materialistic gain but go on for days and days as though they are never tired? Will someone ever recognize the work? Maybe not!! So whats the trigger?? My guess is that equilibrium has to be attained and the entropy in the situation has to definitely minimize as the equilibrium approaches as in the third law of themodynamics. So we reach the magical question that is perched on the Mt. Everest of all questions - when will it happen?
Maybe we all are waiting for a lot of when's in our lives and probably thats the juice that flows and keeps us moving on!!