I'm not sure who downvoted you, because you made a good point. Anyway, I think it's a matter of different strokes for different folks. When I started working p

I'm not sure who downvoted you, because you made a good point. Anyway, I think it's a matter of different strokes for different folks. When I started working post college, I worked a lot of hours, because everything I did was hard. Now I've learned that a "work-life" balance keeps me the happiest. I'm a much better engineer, so I'm more efficient in these 40 hours than I used to be in 60-80 hours. The key has been--when at work, always be productive. When at home, do not think about work. It helps that I now work at a mid-size company that encourages exactly this. :-) Now different strokes for different folks--a very ambitious person should probably work more than 40 hours.