Or just walk away and let it go into low power mode?
All my personal computers are shutdown the moment I stop using them.
My work computers are powered off at the end of the day too.
At my job, I just happen to manage most of the firms computers.
Physical devices, they are checked for uptime. Prompt staff to reboot depending on a number of criteria. Laptops get a more aggressive policy. They shutdown when not plugged in and idol / lid shut for more then an hour. This policy come about indirectly. We had a higher then expected laptop failure rate. We figured out devices were being left powered on in handbags etc., and kept repeatedly overheating until they broke.
On the virtualization front, I power off persistent VDIs once a week. There are a number of rules though to protect outlying cases, e.g. if a user is working late on Saturday night (or Friday if they are based in the Middle East), I don't reboot. This changes though if they've not rebooted / shutdown for over a week and I force the shutdown to happen. I could shutdown more often but it adds additional overhead to login times!