For the most part, I believe in leaving people well enough alone. If I don't have any reason to believe that my neighbors are harming others, then I'm probably not going to notice whatever they're doing from day to day whether I like them or not.
Of course, my neighbors haven't always shared my philosophy and would sometimes bother me about petty matters like what color of paint is on the side of my family's house or how often the hedges are trimmed. Fortunately, they don't have any power so it's easy enough to ignore them if I think they're being unreasonable.
However, my story would likely be different if my neighborhood was run by a homeowner's association.
While there may have been a good idea in there somewhere about keeping neighbors from ruining your property values by filling theirs with cars set up on blocks, it's clear that over the years, a lot of people have abused that idea beyond recognition.