Living in a dense, urban, transit-friendly, bike-friendly city allowed me to forgo car ownership for all of my bachelorhood in my 20s/early 30s.

then I met the woman of my dreams in 2011 and she came bundled with a car. We got hitched, we now have two kiddos and we still have a car because it really makes life easier sometimes.

so I haven't ditched the car entirely, but my bike commuting, along with living in a city neighborhood where we can walk to so many things within a 1/4 mile allows our family of 4 to be a one-car household..... which is nice.