If you want my personal opinion, it depends on how you want lemmy.

.ml is held by Marxist-Leninists. Most users there aren't, but if you care about that, its either for you or aren't for you.

.world is held by centrist liberals. Most users don't care about that, but if it matters to you, there ya go.

My instance is for anarchists. There's ones for queer people. Or people who speak German. Or Italian. Or French. Some are made for being NSFW, some are made to shitpost, some are isolated by choice or massively de-federated.

But most instances don't care who you are or why you're on it, just don't break the rules.

So far lemmy.cafe lemmy.zip sopuli.xyz all seem fine, I don't recall a constant issue with the userbase.