Science Fiction, amateur radio, electronics... and maybe some equivalent of the popular (popcorn) subreddits; damnthatsinteresting, wtf, showerthoughts, TIL.
Ultimately I don't know yet. I'm hoping to see some new stuff that I didn't think to look for. Any topic can be interesting if people are passionate and not toxic.
This. I participate in homebrewcomputers on reddit, would be nice to see something like that here, although the website is small enough that posting diy computer stuff in "Open Source" would probably be acceptable.
Actually I enjoyed to follow non-overthrow-related prepping stuff on reddit. I mean the subs where they present handy solutions for rather realistic problems and scenarios, not these where they romanticise a civil collapse, or extensive weapon hoarding and usage.
Also paintball, mag-fed paintball, archery, hiking and bushcrafting.
Yeah Reddit was chock-full of cat subreddits, having those kinds of communities would greatly increase the appeal of Lemmy beyond tech, FOSS, politics and gaming.
A leathercraft community would be the bees knees. Good place to share tips/tricks, ongoing projects, answer questions or seek advice, that sort of thing.
I really have enjoyed game-specific communities on Reddit in the past -- Dragon Quest and Pokemon in particular; also the /tipofmytongue and /tipofmyjoystick were quite helpful. And /speedruns was super nice!
Also gardening and hot pepper growing; and since I live in Japan a place to discuss current events and life over here is also quite useful.
I decided to be the change I wish to see in the world and created the !kittyterminal community, thinking I might make one for announcing new communities too