When the favorites feature was introduced this year, there was mention of maybe aggregating it to see which were the most favorited types of posts. I wonder if enough people have used it since? I use it and find it to be a great filter on top of what I normally upvote.

"RapGenius Growth Hack Exposed" basically solidified the effectiveness of using HN as a complaints forum: https://news.ycombinator.com/item?id=6956658

Ask HN: Just got an innocent man out of prison. What now? https://news.ycombinator.com/item?id=12010760

Aaron Swartz's initial appeal for help: https://news.ycombinator.com/item?id=4529484

And the difficult discussion when someone pointed out that thread after his death: https://news.ycombinator.com/item?id=5056279

I enjoyed this discussion on Margaret Hamilton, particularly because it for me epitomizes how anonymous the comments usually are. I remember reading Peter Norvig's comment about working with her and thinking, "Wow, this HN user must be pretty senior" before I looked at the username https://news.ycombinator.com/item?id=8735912

edit: In terms of recent, this discussion about "Strange bug workarounds" was just a day ago but had a lot of great laughs in it: https://news.ycombinator.com/item?id=12476855