I miss the local subs for my city and other local communities around me. They were great for keeping up with what was going on. I can't stand all the pissing and moaning on Nextdoor. There are a couple of Facebook groups but I refuse to install any Meta apps on my phone.
Right now I am missing the hyper specific cat subreddits like catswhoyell and catsinbusinessattire. There are so many that I loved to revisit every 2-3 months and see what was there
For me it’s just the smaller gaming ones that aren’t as active or not here, I enjoyed browsing through specific WoW (this isn’t so active), ESO or Diablo subs.
My home page is already in fairly nice shape with “general” interests
I miss the niche trade subs, like r/electricians, r/construction, and r/machinists. Tons of great content on their subs that just isn’t here on Lemmy since most people on those subs don’t skew as techy as most Lemmy users.
Ask Science Fiction, Who Would Win, The Maw Installation, and similar discussion boards for in-universe questions about fiction.
For those who aren't familiar, Ask Science Fiction (more accurate parsed as Ask Science: Fiction) is a board for asking and answering questions about fiction from an in-universe perspective. Questions and answers don't necessarily have to be role-played, but they should assume the internal logic of the universe in reference. Answers from an out-of-universe perspective ("George Lucas didn't decide that Darth Vader and Anakin Skywalker were the same person until later") are against the rules, though there's some allowance for media that's super-meta and can't be answered otherwise.
Who Would Win is a board for posing hypothetical scenarios, often but not exclusively about fictional characters or factions. Think "Who would win in a fight between Superman and Batman?". Evidence in the form of references to specific canon media is encouraged.
The Maw Installation (and similar places like the Daystrom Institute for Star Trek) is essentially Ask Science Fiction, but specifically for the Star Wars franchise. I find that boards like this can encourage interesting world-building that makes the original text feel richer, as well as more in-depth critique of the text as media.
I'm sure some of these exist in some form in Lemmy, but I'm still looking for them!
The art subs, like r/art, graphic design, art nouveau, and all the AI art subs. I was mostly a lurker on those ones but they were really great eye candy.
Also things like earth porn and the nature subs. Was nice to see cool places in my feed.
And the local community subs. I think that will take a long time to develop (if it ever does). I used to get a lot of news on city events from Reddit and without Boost on my phone I'm feeling out of the loop
The subresdit /r/frugalmalefashion was really incredie for a while there, but it thrived in users posting good deals regularly and fair moderators keeping out inappropriate content (i.e. scams, predatory subscription services, and comments like "this isn't truly frugal!"). /r/buildapcsales was the same way
The subs for games like Street Fighter, the sub for fight sticks, the kind of semi-niche gaming communities that snowballed because of Reddit's ubiquity
A bunch of morbid and medical subs like morbid curiosity, medizzy, medicalgore, thegrittypast. I always have found those subs super interesting and filled with discussion about stuff I don't usually encounter in my day to day life so I've been missing that.
The dry-herb vaping communities haven't really transitioned very well, and I'm too lazy to get back into proper community building and moderation after having all my accounts permabanned on reddit. For now I am just sticking to the 420vapezone discord.
There's a Pokemon Go subreddit called TheSilphRoad that was basically the place for in depth discussion on the game. Such subs here have been quiet and shallow.
Seems like all the main ones I subscribed to on reddit are already here in some form, I'm hoping AskHistorians comes on over. There's two more extremely niche communities related to US immigration that I'm in which seem unlikely to ever make it here, but we'll see.
All the niche anime subreddits I frequented. I'm not really a creator myself and I don't think there's enough people migrated to this site for someone else to start posting about PreCure news or similar.
/r/Skincareaddiction, /r/EuroSkincare, various fanfiction subs, /r/Medicine, and a lot more.
Reddit has SO many niche communities that have built up a fairly large amount of information over time. I'm determined to stick to Lemmy but it sucks to lose all that knowledge. It's going to take years for Lemmy to build up.
I miss communities sharing news about the attack of Russia on Ukraine.
I was mainly browsing these subs: r/ukraine, r/ukrainewarvideoreport, r/combatfootage, r/ncd
Non credible defence seems to be active but the others are pretty empty. These subs had about lets a ton of posts every day
Most of the technology subs I followed have migrated to some degree, but I've noticed a lot of "normie" subs are still stuck. For me in particular, r/Writing prompts, r/nosleep, and r/YoutubeHaikus are sorely missed.
There were a few professional psychology related subreddits that had moderation that verified licensure to allow posting only by actually professionals and that was pretty nice
There was also askatherapist which was interesting to get unfiltered client perspectives and offer clinician feedback
Morbidquestions was an interesting sub sometimes. 80% of the time it was stupid edgelord bullshit but sometimes someone would ask a really interesting dark question
Creepywikipedia was a good one and is explained by the name
I miss r/marijuanaenthusiasts, which was so named because weed enjoyers had already claimed r/trees. On a search, I see there has already been a "trees" community on Lemmy for a while now (more than one - because of course), but I turned up a big fat goose egg when looking for its arborism-centeic counterpart.
Dragon Age. I need somewhere to bitch about not having news despite being promised news back in November (like goddamnit Bioware, all we want is a trailer!)
Something to do with systems integration (PLC, fanuc we're a couple subreddits I was subbed to). Also I miss the BMW Z4 sub, seeing new owners pop up, helping others with fixing stuff on their Z4, etc.
A few subreddits I were in were from Hetzner Online (r/hetzner) and Google Workspace (r/gsuite) which I did not find an equivalent for yet. r/armbian and r/armbianusers were mostly secondary since there was/is no interest in moderating those from the official project side. However was reading there from time to time.
r/whatisthissnake, r/subgenius, r/herpetology, r/bash (it is here! But it needs more users!), r/gpgpractice (not that I need it but it helps new gpg users), r/gameboy
Probably more but that's all I can think of right now.