City: None - Cities are arguably the worst place to be during an outbreak. Higher population = more zeds to worry about.

Neighborhood: None - Again, staying as far away from mainstream civilization as possible.

Building or Defensible Location: This requires some advance preparation. Assuming you've got a survival team already prepared (I have), you can begin construction on some kind of shelter pooling talent and financial resources. This can be as rudimentary (basic structure with a palisade) or advanced (actual house designed with zombie defense in mind) as the group wishes.

Attributes: Plenty of tree cover, arable soil, wildlife and water from creeks and nearby ponds.

Pros: Long term sustainability. Even after the outbreak, you can continue with a subsistence farming program factoring in crop growth and animal husbandry. Additionally, if the ponds in the area are stocked with fish, with careful conservation you have a ready food supply. Plenty of lumber in the immediate area in case repairs or barricades are needed. A low indigent population means less zombies to defend against. Additionally, the more out of the way you are located, the lesser the chances of being hit by traveling brigands and looters. One of the primary positives of this locale is that of mobility. If you barricade yourself in a city and run out of food, you have significantly less chances of surviving a move than in a rural area. In the highly unlikely possibility that your area becomes a haven for zeds. You don't have cramped city streets and alleys to navigate, and your visibility isn't hampered by tall buildings.

Cons: Constant vigilance, both with respect to defense and conservation. In a quiet, pastoral venue such as this, it would be easy to become complacent and relaxed, leaving the door wide open for zeds or brigands to attack. Over-usage of natural resources could potentially lead to depletion of the same. No ready structures for immediate move-in. Arguably, a more difficult lifestyle, especially for lifelong city dwellers.

In the case of an outbreak, will you be allowing other survivors to join you here? Absolutely, within reason. The Biblical rule of "If a man shall not work, neither shall he eat," will be in full force, for obvious survival reasons. Survival has more than just physical considerations. There are also emotional and spiritual considerations that are just as important, if not more. I Am Legend by Richard Matheson touches quite poignantly on this. We need contact from other human beings to stay mentally and emotionally fit. Also, each person has their own unique skill set and talent base. Everybody could be potentially invaluable to the group.