This experience fits me as well. I'm older, no kids, don't spend a lot of time outside. The neighbor on one side is nice and friendly and he gets to have all the apples and plums off of my trees as he wishes. The neighbor two houses down gets red in the face angry at me if I wave at him as I drive by. Apparently, just keeping my lawn mowed regularly but not perfect is enough for him to hate my guts with a surprising amount of passion. The neighbor who shares a line of property with me (but lives on the street behind me) I've talked to twice the summer I moved in in '99. Both times he berated me about my lawn while I tried to just say "hey, I'm your new neighbor, nice to meet you!" He put up a fence high enough so he couldn't see my lawn before I managed to tame it back to the "not perfect, but not crazy" state it's normally in now.

It's amazing to me that not keeping my lawn looking like it's part of a fancy golf course is my biggest hurdle in making friends with my neighbors.