I've a couple of times gotten feedback on flags where I selected "not an answer" which says "...should possibly be an edit, comment, another question, or deleted altogether..." and (for example the most recent time) the reviewer declined the flag, commenting that they weren't comfortable deleting it. In this particular situation it should probably be converted to a comment, not deleted.
I seem to do better selecting "other" and specifically saying "this should be a comment" but after reading the small print on "not an answer" I thought I'd just go with that one.
Which is best? Selecting other and pointing out the reason, or selecting the correct flag type and getting declined.
To be clear, I'm not offended that my flag was declined, I just don't want to irritate the flag reviewers.