recurring topics. My answer won't change:

• More quality content/comments. People will go where they find what they're looking for. No matter teh sad show reddit has turned into it is still filled with quality content (even more so in 'niche' communities).
• Less preaching. Does anyone really think that by telling people they're doing it wrong or worse that they're being dumb (because they're using this or that) we will encourage them to change their habits?
• Less politics. My very first impression of Lemmy was almost enough to make delete my account. Politics, not the most subtle one, and memes were everywhere. Not really the type of content I was looking for (I'm fine discussing politics with anyone willing to discuss it provided we can go above the mere 'you're wrong because I don't agree with you' or the 'you're fascist if you don't hate what I hate' type of discussion).
  Everyone should be able to chose what they're exposed to (including politics and memes, btw) but forcing them to taste it out of the box may not be the... most seducing default.