Trying to take as objective a view here as possible... The present hacker zeitgeist disagrees with your viewpoint. Your post came at a particularly bad time, as this post is fresh on the collective's mind: http://sethbannon.com/vacations-are-for-the-weak
And, well, I don't disagree with that! Neither do I disagree in taking off some vacations, if that makes you feel better (and/or more productive).
But my point here is that we should strive to try to work on something that's aligned with our life goals - and those may include spending time with your family, traveling or building a charity. This way, work would have other meaning to us.