The only time I pulled a free week end at a company I worked for out of niceness, my boss was sitting in our office evidently having nothing to do beside support me and bring me a coffee every couple of hours.

At the time I thought that's not needed go home, but with retrospect I respect him a lot more for that.

That might sound dumb, but that's one of those things that stick with you when evaluating how you are treated by someone