I've known at least a few guys who did indeed like working long hours in the office, since that was less stressful than going home to a house full of cranky kids at bedtime. One co-worker even relished his 1.5 hour commute as the only relaxing parts of his day.
I often like to hang around the office to take care of personal business-but-not-work stuff between 6 and 7 pm. Things like personal finance, doing accounting for this one volunteer organization (I'm treasurer), browsing and booking personal travel. I never want to do that stuff once I'm at home, so putting that into the 6-7 pm window both lowers temptation to do it during the business workday and pushes out an urge to keep working on work stuff late.
I would call that selfish (avoiding the kids at home, that is). Sure, there are plenty of days I'd probably just rather hole-up in my cube and code late into night, but I don't because it's more important that I be an engaged parent. It's not like my kids are going to get a do-over on childhood.
I often like to hang around the office to take care of personal business-but-not-work stuff between 6 and 7 pm. Things like personal finance, doing accounting for this one volunteer organization (I'm treasurer), browsing and booking personal travel. I never want to do that stuff once I'm at home, so putting that into the 6-7 pm window both lowers temptation to do it during the business workday and pushes out an urge to keep working on work stuff late.