Should one turn OFF a MacBook, or let SLEEP at night?

A friend just bought a MacBook. I have a PowerBook G4... I was told to turn it off at night... my friend has been keeping his new MacBook on SLEEP at night...
I hear too much SLEEP can goof up the computer sometimes running programs, and I hear turning the computer OFF more prone to breaking down sooner than later.
What's the right thing to do - and why?
Thanks in advance...

There probably is no really right or wrong answer to your question. Mac OS X is very happy sleeping and waking when you're not using it. It does not really need to be restarted every day. (You might visit hitup.org where you'll find some people have been running Mac OS X without restarting for more than 1,000 days.)
Personally, I have not shut down or restarted any of my Apple laptops that were running Mac OS X for the last five years, except for system updates. However, the "cron scripts" that do some maintenance over night do not all run if your computer is asleep. Some will run when you wake the computer back up. But, it's easy to run them yourself manually with the Terminal or with a third-party utility.
-Doug

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