Anyone I have ever interviewed who told me a story of sleeping at work (only 2 have) I immediately put in the no pile. It tells me nothing except that they have terrible time management skills. Working longer hours does not equal better/more successful employees, in fact, more often than not it indicates the exact opposite. I look for people who have succeeded at work not by working longer hours, but by working smarter, and integrating their home/work lives in clever ways. If you don’t have time to go home, you are failing to work smart, failing to delegate appropriately (if you say no one else can do the job you are failing at training), failing your family and self, and failing to get the job done in a timely manner. Basically you are a failure. Go home.