I read HN mostly via email newsletter and I'm interested in like 5% of the content, if I read one or two articles from newsletter it's good. The same as with other newsletters I'm subscribe for. Each social network has different content post by different people. If you merge all those places into one thing you can't keep up with the flood of post.

I've once was subscribed to a few subreddits via RSS and I was not able to read even headlines and they were accumulation over time.

I was also trying HN100 RSS (post that reach 100 points on HN), and most of the stuff was not interesting to me. So even reading headlines was a waste of time. Not to mention that I was not able to keep on reading the headlines to have 0 RSS inbox.

What I would like to see only post that I would really like, and I believe that you can train SMAP filter to do that.

And about SMAP filtering I don't want to filter SPAM as in an email SPAM only stuff I'm not interested in and I see a lot of post on first page on HN that I'm not interested in.

I would like stories recommendation based on my interested not common interest on every HN reader. Most HN readers are not average HN reader.