Religion

Hexbear, AuthLeft

Advertising communities

Political parties

"General", unspecified non-meme communities (nowherelsetopost etc)

I don't block much but I do have a couple of filters that do good work on Piefed.

1. A spider community because I ain't about that life as an arachnophobic person.
2. A bunch of minecraft communities because I completely ditched the game after they decided that Java players aren't allowed to use adult words anymore on their private single player worlds and also because of the whole chat thing where all messages you send are linked to your specific account.
3. Entomology because I don't fuck with bugs.
4. A few different AI communities because I try to avoid AI if possible.
5. A community about dicks and dick pics. Not my cup of tea and I don't feel like seeing them on any feed since I don't blur NSFW images.

Those are just a few. The rest are minor things or other communities that are the same thing essentially, but on different instances.

Lemmy.today and hilariouschaos.com for the same reason

Anything Linux. We get it. You like Linux. If I wanted to be converted by religious nuts I'd still be talking to a whole side of my family.

So far none.
Only individual users.

All the Sports and racing stuff. They're really spammy and i just don't care about sports.

I don't block entire instances, but I block every single community I'm not interested in - which probably adds up to over 500 by now. I tried blocking all the mean or extremist users, but that ended up completely killing my feed, since that seems to be about 80% of active commenters. So nowadays, I use content filters to screen for keywords in comments and posts. My list of keywords is quite substantial and keeps growing every week. At this point, I'd say about 50% of the threads on my homepage get filtered out. While I can’t know exactly how many comments are being hidden, I’d imagine it’s about the same.

Funnily enough, even after all that filtering, a significant portion of what still gets through is full of mean, snide remarks, tribalism, toxicity, negativity, doomerism, hopelessness, and that classic crabs-in-a-bucket mentality. A smart person would probably just give up and bail - but I guess I’m not that smart.

All communities with AI generated content.

Mostly just sports communities. They tend to post a lot, and I just don't really care about sports outside of Motorsport. If Arsenal has some insane game, or gets a great player signed, I'll hear about it at work sooner or later, either from coworkers or a customer. I would say the only big sport that doesn't apply to between those played in North America and Europe is probably cricket, cause nobody has time for it. Then again, haven't seen a single cricket post, either.

I can stay current on what's going on with the NFL, NBA, MLB, Premier League, rugby and even hurling, just by showing up to work, so there's no real benefit to seeing it here, too.

Also, AI communities get blocked pretty much as soon as they pop up in my feed. The novelty of "Hah, that's crazy that a computer made this image" has long since worn off, and I have no interest in seeing the umpteenth iteration of some AI take on art or photography.

I don't have the option ticked to show nsfw content, and people have generally been good about tagging such content, so I haven't had to block anything there.

Just checked and it's a whole bunch of nsfw ones (I don't block all nsfw, but there are a lot of weird communities in that category that I don't need to see), a bunch of German ones because they were taking over the feed at one point, and theonion (which I don't really find funny anymore)

*meme*

Rick and Morty com. No explanation needed.

The short answer is anything I don't like or want to see. The shorter answer is .ml.

All the anime, furries, sports, non-English, news, and politics.

the extremist ones and the porn ones. include triad, i dont block bahaj one, as i have no issues with it.

Sports and Linux.

I have no interest in sports.

I also have no interest in Linux, I have installed and used Linux around ten years ago. If and when I need Linux I'll just go to the mainstream internet or just unblock them and join. But for now no.

Some foreign language communities don't seem to have their language marked so they still show up despite my language settings, so I blocked them to make things easier.