[TeMPOraL]

Reddit is actually quite a complex ecosystem nowadays. There's a lot of HN-quality subreddits focused on particular topics. I'd risk saying that most topical subreddits are sort-of OK. The rule of thumb I'm seeing is: the more niche the interest, the better the community. It's only when you start dealing with "normals" that you see the worst parts of humanity.

[digi_owl]

As a general (no just limited to Reddit) observation, the easier a topic can be opinionated the more noise there will be.