My best comments usually get about 5 points. That's because the best things that I write are usually on very specific topics that I know a lot about. However, the way that breaks down is that there's a tiny number of people who also know enough about those things to know if I'm just talking out of my ass or actually saying something useful. And even if they could tell, there's often not enough backstory for someone who doesn't at least have a passing interest in those areas to make sense of them.

On the other hand, my 50+ point comments tend to be some combination of well-timed, snarky and generic. Basically, they're the sort of thing that HN wants to discourage. As such I'm generally a fan of the scores being hidden.