Shiny new layout!
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I usually leave it on all night, mainly because I tend to get pestered at weird hours by people asking questions after I go to sleep. That and if my computer starts up after a while all the mechanical parts starting up again sounds like a monster
If I'm going on a trip, it depends. I may or may not remote home back at some point so I may or may not turn it off.
The laptop is always asleep/hibernating when I'm not using it.
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The question is what is the question