Adequate employee

I have not always done this, but I now do not wish to be an outstanding employee. I certainly want to be one that is adequate, one who does what he is hired to so. But it has been my observation that many outstanding employees are sub-par spouses and parents, simply because they allow themselves to become slaves to the company (not merely employees), and thus use that as an "excuse" to neglect their familial responsibilities. I do not want to do that.