Our immediate neighbors (on either side of me) are mixed, but mostly good.
The people behind us are quiet and nice enough.
The woman to our east is nice and maintains a nice home. I went to high school with her son, who is now our vet technician, so that's nice.
The house to our west... Well, if I could burn it down, I would. It was bought by a couple as a fixer-upper but they ran into problems or something because they just stopped fixing it up. It's appearance looks fine, except for the lawn. They'll come by and mow the front yard when it gets to be about a foot high, but the backyard is up to 16 inches with who-knows-what living in it.
I've left them notes, that I assume they get but have done nothing about. And I've called the city once, and despite saying they'll send someone out, no one's been out that I've noticed because the grass is still tall three weeks later.
I guess I better call again.