We all have our issues.
The real reason I have worked even till 3am and been to the office sharp at 9am the very same day is because I can't handle the silence at home. More so after my mom passed away last year. Tried being serious in relationships a couple of times, but failed to open up. Work is the only way I can keep my head off things. And before you say it, I tried everything...but pills.
Try to gauge why someone's doing something and if they're doing it sincerely or just faking it. Trust me, as someone who spends way longer observing people than I should, it helps you read between the lines.
We over workers aren't always doing it to impress the seniors. Sometimes it's just clinging to the last straw, the last that we have any control over and the only one we think we know.