It's always good to keep your Mac updated to the most recent version. It's prudent to wait a couple of days and let the neophytes test any problems, of course.
EDIT: Just check the Build numbers on Wikipedia, and it seems I'm running the original 10.8.2 on my 2012 mini before it was pulled. I generally install every update as soon as it's available. I've not had any problems with it.
Even if there are issues, Apple uses sorts them out quickly. The worst one was 10.6.6, which knackered OpenType fonts, and I had to reinstall an earlier version until they introduced a Supplementary Fix.
If you wait for the next update, in the hope that will fix everything, you'll always be waiting!