I would NEVER do on clients servers except those so cheap I don't see their system until near death. I run the updates manually.
I don't on my machine(s) because I periodically do them every few weeks. I would suspect you would be similar as long as you do them.
Friends / Relatives / Non-WSUS clients? Yeh, I put on Auto Updates. In the end they will need to call me less than if they never get updated. Which means I'm doing a better job for my clients, and not getting sucked into a lot of "free" work for friends / relatives
