Likes: the small community, traditional forum vibe. No ads, no oppressive corporate hand to keep things advertiser-friendly. Interests and views tend to align, but I can have a healthy disagreement on many issues with most users here.

Dislikes: heavy use of downvoting simply unpopular opinions (a mild annoyance). Difficult to pick between posting in a rarely active niche community and a very active but general community (sometimes I just crosspost). The threat of centralization, with Lemmy.world and Lemmy.ml having by far the largest communities (I would like to see more active communities spread across sites, though I make an effort sometimes to comment on different servers). Some big features I’d like to see that still seem far from implementation, such as multi-communities.