For what it's worth, as someone participating in communities I'm likely to gravitate toward the most established one irrespective of what instance it's on. If there's a problem with an established community (bad moderation policies, bad moderators, lots of posts I don't like, or whatever) then I'll look for alternatives.
But generally, I'm more interested in more communities covering new and niche topics than I am in local copies of communities that are healthy on another instance.
When creating a community, it would be nice if you also upload an icon and banner. Please make sure you don't use copyrighted images but instead create your own or look for rights-free material.
we lack a /c/mealtimevideos in lemmy (at least I couldn't find one on any). That is, links to thought-provoking videos that are ~5-15 minutes long. Bite-sized videos just long enough to watch while you eat your lunch.