Really, that's what it's all about. Whether you know it or not, that is why you keep coming back and busting your ass. There has to be an element of enjoyment.
This doesn't necessarily mean it's all rainbows and daisies while you're grunting and wishing for swift relief from your physical duties, but somewhere along the line something about what we do makes you happy. What is that thing for you? Is it finishing ahead of your un-official nemesis? Gaining a skill you previously thought impossible? Giving the 'crazy-horse-eye' to your coach in the middle of some heinous task?
Post happiness to comments.