I'm raising kids in a walkable neighborhood.
At this point, my biggest concern is still that they'd get hit by a car. At their current young ages (under 5), they're just not good about understanding where danger comes from when crossing the street or a driveway/alley entrance. Even later in life, I'm wondering how old they'll have to be before I'm comfortable with them riding their bikes on city streets.
At some point, I expect it to pay off (they'll be able to go to hang out with friends and bring themselves to school long before they turn 16). I'm just hoping I'll be able to stay in a walkable neighborhood when they're at those life stages, so that they can take advantage of the good stuff that this neighborhood has to offer.