I'm on https://mastodon.world, but for personal stuff I created https://ruud.social and for hobbies I run https://pool.social and https://musicworld.social.

Oh and I also have https://calckey.world but I don't post too much there.

Why, https://mastodon.world of course, since it's also ran by @ruud, the admin of lemmy.world. I feel he knows what he's doing with hosting better than most instances.

Ah! I'm on Mastodon.world!

EDIT: You also asked for why. Well, I wrote a blog post about it, actually...

leftist.network

Seems kind of self-explanatory...

deacon.social, as I'm Christian. It's a niche community, but it works almost as well as the big instances, while defending the Federation system.

infosec.exchange, I don't work in infosec but it's a cool community

I'm over at https://mastodon.gamedev.place and enjoy it a ton.

There are a number of prolific game designers as well as tons of indie devs sharing knowledge + life updates. A very cozy instance without any hateful BS.

I'm on mstdn.social. The admin is really cool, and the server is big enough to my liking.

Linux.pizza because it had open registration at the time I created an account and I am interested in both, Linux and pizzas.

https://mastodon.social just as I am on https://kbin.social

I kept it simple.

Just don't join any big instances. It will kill the purpose of fediverse.

Go to official mastodon site. lot of instances is listed there. Choose whatever instance you think will surve your purpose :)

I mostly active on my own (non-mastodon fediverse) instance, I do have account on small instance, but it is collecting the dust most of the time.
Given you are on Lemmyworld, I think it is better to join mastodon.world. It is also owned and managed by te same people who runs lemmyworld. I like their transparency.

If you can find a server, that is literally local in focus, I recommend that. Literally Geo local.

tech.lgbt/ it's a bit self explanatory lol

fosstodon.org - They are very competent people and there to stay.

I run https://dmv.community for folks in the DC/Maryland/Virginia area, and I run https://pixtagram.social Pixelfed instance.

I use kbin microblog feature to post to fedi

I'm on mastodonapp.uk for the same reason I'm on feddit.uk; I sought out a local instance.

kolektiva.social, the name is cool and it allows 10 000 long posts. Also, it's an anarchist instance and being an anarchist I kinda like that.

I'm on linux.pizza I'm a linux guy, and the server is administrated by a swedish guy, makes it easier to communicate with the admin. He also has been really great when I've been interacting with him :)

programming.dev

There are a lot of tech communities here. If you're geeky come and join us.

Otherwise, there are lots of options and comparisons here: https://github.com/maltfield/awesome-lemmy-instances

I have 4 Mastodon accounts, 1 on Vivaldi (as I use this browser), and 3 on Polish servers. My main one is on 101010.pl (largest Polish, can read formatted posts), other ones are on pol.social and mastodon.com.pl. I was also on calckey.pl, but Calckey appararently was not ready for use - the instance is now closing down. I have a Polish /kbin account (on karab.in), and WriteFreely and Mobilizon accounts.

I recently joined Fosstodon and so far it seems like a nice and well moderated place to connect with others about tech and open source.

I'm on mas.to. Chose it because it's got a decent UK presence (but isn't a UK-specific server), is quite popular, and the admin runs it well.

I’m hosting my own calckey instance now, but before that I was on techhub.social which was really nice!

I'm on neovibe.app however federation over there is completely broken right now

mastodon.social because I didn't want to spend time looking at a whole bunch of different servers and filter through them all. It's the biggest, so I just went on there.

https://universeodon.com

@Thunderdonk4444 https://infosec.exchange/ as evident from me replying through it.

newsie and mstdn.games

I have an account on mastodon.online

I'm on urusai.social right now to talk about anime / manga / general tech. Probably gonna end up creating an additional account on a more general instance to talk about things on a whim too

I’m on Mastodon.social because I thought it was as good as any other, but after reading comments here I’m considering switching to mastodon.world

I'm on Masto.ai and Dads.cool.

I'm on sciences.social, because I am a social scientist. There's a number for different sciences that are good for keeping up with your field. I don't know about other occupations but I assume they're out there. Also, as with all things federated, the server doesn't matter too much once you get rolling.

oldbytes.space which is good if you love retrocomputing, otherwise you'll be a bit lost on the local feed.

mastodon.world, clearly the best!

easymode.im

Calckey is a much nicer experience than mastodon; https://calckey.org/