To each their own but ideally so that you don't have to drive everywhere. So that meeting your neighbors isn't so rare, and you can build community trust. So that you don't have to buy everything in big huge amounts so you don't have to make a big trip. So that the young and the elderly can get around without assistance or endangering others. So that common areas can grow and give your community a unique identity.
Basically less cars/road infrastructure and building community trust. Though, and you'll probably mention it, it would take way more than a walkable neighborhood to fix these things. I mean if you don't even want to know your neighbors this would be hell for you. While I appreciate the idea of communal spaces, there is a lot to be said for independent space as well.
I've always sucked at geography and knowing anything about the world in general, but I think it's pretty cool that this land form kind of looks like a slingshot