Jaso: the re-assessment has convinced me that I'm not learning any more. I did once upon a time, but I'm not now. That's why I'm largely stopping reading, certainly stopping reading the comments. I'll still read the links submitted by people I've learned to trust - people who have similar interests to mine.
I've never used Reddit, so I can't comment about that.
ADDED IN EDIT: Just to clarify a little - there are still people here from whom I can learn a lot, and I'm sure there are still comments and submissions that I can learn from, but they are drowned by stuff I consider irrelevant, repetitive, uninteresting, or otherwise not something to learn from. The gold is hard to find now, the returns are no longer worth the effort.
Well if it makes you feel any better, a friend and I started another service that hopes to give people more control over the quality of their front page. We literally just released started inviting people to the site today.
If you'd like an invite, let me know. james@forrus.org