Lesley Carhart 
Nextdoor lately is just people over 60 complaining that the price of everything is suddenly and mysteriously so shockingly high, and then two posts later mocking everyone under 40 for demanding a higher minimum wage.
Catherine Kehl@hacks4pancakes Nextdoor varies so much by area. Mine is about a third finding pets, attempting to place pets, and cute pictures of pets. A lot of pictures of wildlife and discussion of native plants. The ongoing fight between a resident of a subdivision and the board around mistreatment of wetlands. (Pretty sure the resident has the right of it.) Some requests for recs for various services. A missing person (local big deal, seen this on other platforms, police are involved.) And discussion of someone in a mask on an electric scooter who is threatening single women walking on some of the local trails.
@hacks4pancakes Other perennial topics are
"OMG, I can hear someone firing a gun" - "Doh, you are living in a rural part of the south, people hunt." (We're in the rural part of the NC triangle, so both responses are expected.)
People comparing pictures of folks in the processes of stealing packages or breaking into cars as caught on their ring cameras.
One person complains about a local restaurant, many people jump in and say it's a really hard time in the food biz, why don't they shut up?
But then, I'd mostly liked it back in Cleveland, until the last few weeks I was there when it was suddenly all Oh, noes, I saw black teenagers and they are so scary!!
Dewey Ritten 
@tylik This could be my neighborhood lol (central Florida). Considering almost all of my neighbors are Northern transplants, I also get a lot of complaints about the heat and other people quickly correcting them that the problem's not the heat, it's the humidity.
Also very irrational fears of alligators and constant complaints about bad bagels (??).
@deweyritten heh. I do spend a fair bit of time trying to find good bagels (the co-op ones are decent) though I don't post about it. I'm from Seattle though - which is northern, yes, but really west coast.
@tylik oooohhh Seattle! We want to take a cross country train ride to there soon!!
But truthfully, I do adore most of my neighbors. One time I posted a question about where to get fresh pasta and a woman born and raised in NYC asked me if I knew how to make it, then offered to teach me. We're friends now (even though Im still bad at pasta making).
@deweyritten I've been really happy here - Chatham is full of weird old hippie houses in the woods, and small farms and artists.
@tylik that sounds really nice; this is all new developments in between small farms, but the local produce and prevalence of "pickup truck farmstands" is lovely