[ghaff]

Absolutely. Aside from quite a bit of work travel which inevitably blurs the boundaries between personal time and work time (as does the fact that otherwise I mostly work from home), I generally keep work to work hours.

However, as you suggest, I also generally will do a bit of work here and there if something comes up and tend to checkin on email now and then at home. Conversely, I'll run out and do a few errands on weekdays if I need to pickup groceries, etc. I know a lot of people have trouble setting boundaries for various reasons (with faults on both employer and employee sides) but overall I find flexibility can be a better deal for everyone.