Some threads attract one crowd and the comments go one way, other threads attract the other crowd and the comments go the other way.
I really wish Hacker News was about startups, and if there was any debate, we were all capitalists debating it. I'm tired of the seemingly endless stream of leftist propaganda that gets promoted to the front page (e.g.: anything by Krugman, for example.) I'd hate this just as much if it were all rightest propaganda. IF it was balanced, I wouldn't like it, but it wouldn't be irritating.
When almost all the discussions are of one mindset, and posting something outside that mindset gets you down voted to oblivion, I feel like intellectual discussion is much more difficult. This isn't always the case here, obviously, but sometimes it is.
I don't really care for Amazon, but at least when Amazon is on the front page its because they did something relevant to the site. I can just ignore those threads. Amazon' announcing that they've got a new finger service in AWS doesn't add anything for me, but it doesn't detract like the political topics do.
Cloudant, a company that takes CouchDB and turns it into a dynamo style ring, has produced something significant in their platform. We should be talking about this.
Cloudant provides a very useful tool that should be very highly relevant to people who are doing startups.
The thing is, I suspect a major population of HN commenters aren't really doing startups or planning to.