I don't know if you are going to read this, but I'm going to write it for the rest of the audience too.
I think the trend of dismissing critics and commenting along the lines of "sour grapes" or "haters" very disturbing. Yes I go against your commentary. The great thing about internet and communities based on pseudonyms is that you get the first reaction that people have. Very few will take a few minutes to give their opinion, weight the different possibilities etc... It's brutal, it's direct. If you have run a service online you certainly know that you receive very angry/ threatening emails from people that use your services and are displeased. If it disturbs you it means that you are not ready for having a personal project on display, it's as simple as that. People in life and particularly on the internet are very angry and you have disturbed individuals. Opening a service with your name and your address is becoming some kind of "celebrity", people will HATE you for no good reason.
To come back to what I think is bad/annoying on Hacker News is of a different nature and I'll list a few:
* Well thought comments are often ignored and not read ( not up/downvoted, just ignored )
* Stardom: No matter what they post some ""famous"" people around here get their post on the front page. By courtesy I won't list who they are but everybody can spot it pretty easily. I'm very disappointed by this attitude personally, and it doesn't speak highly of a place that is supposed to be almost a pure meritocracy.
* Fads/ Jealousy: A lot of people here want to be rich and famous thus it creates tension. It allows me to come back to your point: these people are likely going to dismiss your ideas based on jealousy.
* Over-repetition of some stories ad nauseum: dumb benchmarks to see the number of req/s, analysis App.net, Education sucks...
All that being said it remains an interesting community but with some drawbacks. I guess nothing can have it all.