I had some really bad neighbors when I was growing up but that was years ago
I live in a townhouse with 3 connected units.
One of the neighbors isn't that great. It's a woman in her 30's with a whole brood of kids (3 of 'em) and she has an off-and-on again boyfriend. When the boyfriend is there, they argue and scream at each other...right on the front porch or out back in the common area. A few times it was so loud that the police were called...and nothing ever happens in this town
She screams and swears at her kids, when she can be bothered to watch them. They pretty much run wild all over the place and have torn up the townhouse they live in as well as destroyed the new gutters and plantings the landlord put in. The kids just leave their toys all over the yard and common area.
The landlord had kind of neglected the grass last summer and one of the kids had left his scooter in the grass. When the riding mower went over it...we'll just say that the landlord is still p*ssed off about the cost to replace the mower blades.
Extra points for classiness because they toss garbage on the ground and either us or the other neighbors end up picking it up because we don't want to live in a garbage dump.
They had a cat and didn't keep the litter box clean so kitty pooped outside of the box one day and the woman put the cat out of the house and abandoned it
Managed to find a good home for her though. This woman shouldn't have kids or animals...grrr
The neighbors on the other side are okay. They are a retired couple and say "hi" and "bye". They are kind of stuck up and go on and on about how their Toyotas and iPhones are better than our Fords and Samsung/LG. I don't let it get to me and laugh it off. DH gets more irritated with it than I do.