I had a dozen years to act before starting a family then found that motherhood dwarfed everything else. Once or twice a year, I take a project that appeals to me for its redeeming social value.
I didn't worry about leaving the fast lane - I was just so consumed with my baby that it seemed like the right thing to do. I never felt like I left New York, though. If you've lived in a place and loved it, you never feel like you left it.