Also depends on what sort of lemmy community you want, some allow nsfw but not porn, some allow downvotes, some don't. Some have defederated from lots of communities shrinking the content you can access. When I sorted through the giant table of lemmy servers and looked at which ones had the things I wanted in a server, there were only one or two that would work for me. Of course that list will grow, but it's not so easy to just switch.