I started insisting on this when I was ~30. I've never had a problem with establishing that boundary early and holding to it strictly. No one has ever held me b

I started insisting on this when I was ~30. I've never had a problem with establishing that boundary early and holding to it strictly. No one has ever held me back in my career as a result. I have put in long hours in the following circumstances: * I really, really loved what I was doing, and I just wanted to do more of it * There was an emergency and I was needed to resolve it. I'm happy to do this if my org has a culture of post-mortems, root causing, and following through on fixes. * Annual review/perf season. I'm a manager of engineers (as well as an engineer). The one thing I'm willing to bend my boundaries on is making sure my people are well represented at perf time. Ideally I'd get this done in work hours, but I can't always, but I can't let someone lose recognition for their work because I couldn't find the time to write them up positively for it.