I'll get buried for this, but I don't see HN as a community. To me reddit seems to be able to foster a sense of community with meetups, fund raisers, secret santa etc. HN is just a link aggregator with comments.
I don't really see how any reasonably open group of several thousand people can ever interact as a community (and I wouldn't be surprised if the limit is in the hundreds, e.g. Dunbar's number).