The rating of a comment has little to do with its validity as does your emotional attachment to its subjective value, or "favorite" as you call it. You might ha

The rating of a comment has little to do with its validity as does your emotional attachment to its subjective value, or "favorite" as you call it. You might have a small and vocal minority actively downvoting something, making a comment look controversial when it really isn't (climate change or sexism topics come to mind). You could also have a highly upvoted comment that is essentially a debunked urban myth. We should judge all comments based on the validity and logic of the content they encapsulate, perhaps allowing a few percentage points for impulsive human nature. 80% Logos, 10% Ethos, 10% Pathos. That being said, I wouldn't obsess over any single comment. 99.99% of ideas presented on HN and elsewhere on the internet are by no means unique and if they are, the only way it's possible to tell is in retrospect (the famous Dropbox post comes to mind)