this is a great article from Time.com; well worth reading…

For every person consumed with the need to achieve, there’s someone content to accept whatever life brings. For everyone who chooses the 80-hour workweek, there’s someone punching out at 5. Men and women — so it’s said — express ambition differently; so do Americans and Europeans, baby boomers and Gen Xers, the middle class and the well-to-do. Even among the manifestly motivated, there are degrees of ambition…

Read on