One of the things I've learned over the years on HN is that I don't appreciate comments that are generic expressions of identity. That is, if somebody posts a comment that contains nothing specific to the subject at hand, that boils down to "I am progressive" or "conservatism is good" or "X is evil" I downvote it. That sort of comment is the bread and butter of so much internet discussion; we don't need more of it, and it doesn't contribute to what I enjoy about HN.