I like Hacker News for discussion about bleeding edge tech, but that's about it. I don't contribute anymore because I don't see much point (plenty of high quality discussion by the time I get there).

There's certainly weird comments, but I understand where they're coming from and can usually tune out the stuff I dislike. Then again, I'm probably politically/philosophically closer to that group than I am to the people here (I consider myself a libertarian paternalist [i.e. the book nudge], so a little left of the US Libertarian Party). But I spend most of my time here because the topics are more varied and the discussion often feels more authentic.

I like HN for discovering new blogs, but the comments can be really weird and lots of people seemingly only read the headlines.