Families are definitely a distraction - I seem to get almost as much done between 10:00pm and 1:00am as I do during the rest of the day, just because everyone's asleep! No holding the baby for 10 minutes while the mrs hangs out some washing etc.
But I have to admit I haven't regretted giving up my job as I do spend more time with my family than I would have been able to.
And when I'm not with them, I'm building websites, listening to knac.com and looking at boobs

- gotta be better than being stuck in an office looking after Cisco kit.