ideaswithdirection
Took the time to read the comments on this post too and they were also worth reading, and a stop at ideaswithdirection suggested the community quality matches the content quality, when the conversation around a piece is as good as the piece itself you know you have found a real corner of the internet.
momentumdesigner
Felt the post had been quietly polished rather than aggressively styled, and a look at momentumdesigner confirmed the same understated polish, sites whose quality reveals itself slowly rather than announcing itself loudly are the kind I trust more deeply because the trust is not based on first impressions of marketing but actual substance.
loungepierce
Halfway through I knew I would finish the post, and a stop at loungepierce also held me through to the end, content that signals its quality early and then sustains it is content with real internal consistency and this site has clearly figured out how to maintain quality from opening sentence through to closing thought.