@Home.
Nothing. My Windows partion is already on Win8.

@Work
We are still on XP and will be moving to Win7.

@Mom,Dad + other relatives using me as their unpaid IT-support serf
Everyone already on Win7 or Win8.

Win8 is pretty good, if you're doing IT-support for relatives. Just use Classic Shell, or other similar alternatives. The key point is to get rid of anything and everything Metro on the UII, which no fossil will ever learn to use (not that anyone should use anything that horrible).