If my answer is too similar to Joe Strazzere's, I'll delete it. The reason I'm still answering is because I did work for a company (for 2 years) that did this, and below is how I handled it.
A couple years ago I worked for a company in the US that had a weekly Monday morning meeting that started off with everyone (around 6 of us) giving their "personal and business best" from the previous week. (There was no written policy saying we had to however!)
For context, people in this meeting did go into very personal things, such as what they did with their family, their significant other, where they went, things about their kids, and so on.
I'm a very private person. This expectation didn't sit well with me, but I didn't want to put myself in 'special snowflake' status and make a big deal about having to answer personal best, either.
Some examples of what I would say in those meetings for 'personal best' for the previous week:
- I didn't die
- I paid bills
- State the price of fuel
- Give story about triumphing over a clogged drain
- I mowed the lawn
- I did nothing over the weekend and it was great
- I bought new socks
I would start with my personal best, give a very short statement, then transition right into business best. The business best then would catch and hold everyone's attention, and I was in the clear.
If I would have needed to give a 'personal worst', I would have chosen something like:
- A long line at the grocery store
- Stepping in a puddle and getting wet socks
- Traffic/Construction on such-and-such highway (this would have probably worked every week)
- Got some bad coffee at Johnny's Coffee Emporium
What I perceive as 'personal best' could be anything. The above were always short, true, and didn't compel anyone to ask anything further. I never caught any grief using those types of responses. I would always give a legitimate, detailed, meaningful response to business best, though.