None of the comments I upvoted were in any of those categories -- at least not IMHO, and therein lies the problem, it usually comes down to a matter of opinion.

None of the comments I upvoted were in any of those categories -- at least not IMHO, and therein lies the problem, it usually comes down to a matter of opinion. As long as PG doesn't separately state upvotes and downvotes, a better answer might be to reply to comments you don't love with "RTO" (restates the obvious) or "ANTD" (adds nothing to discussion).