Home computer of mine I keep on all the time, but monitors turn off after like 2 hours. Wild hair and I'll shut it down for the night.
2 other pc's (users) in the house I think~ sleep. They're weird! :3
First build I bought all over at least a week or a few more than that. More on the second. Even more this third (re)build I've scouted out parts a bit more than that even mostly because of case mods. It's actually been such a help stretching it out because you'll find that you're constantly missing things. Example: "Oh I might want this white SATA cord" or "Oh crap I need pwm fan splitter(s)".
And of course *upgrading* all specs is a constant. Yey tech D: