I'm a millennial. I don't want any kind of suburb. I refuse to live anywhere that isn't well-connected/dense enough to provide a good lifestyle completely car-free (i.e. all travel is quick, ubiquitous and convenient on foot/bike/public transportation). I do not ever wish to drive and this is not possible in any suburban development.
Out of curiosity, do you have kids? It's mighty convenient to have a car with all the stuff in it and plenty of space to park that car nearby, and also lots of space for the kids to play outside.
When we looked at places I gave an immediate veto if there wasn't a sidewalk or if there wasn't a trolley stop a within 10min - 15 min walk, or a bus within 5min. Our elementary school is an 8min walk, the middle and high schools are about 20min. We only drive when public transit would more than double the amount of time it would take or if we need to go where there isn't transit. My wife will also drive for the large grocery runs each month, but the week-to-week is put in the stroller and carried home.
We enjoy this. Cars drive us nuts, not to mention the hassle of parking.