Comments are so unlike the posts. You make a deliberate decision to read a post. After that reading comments is the logical next step. You go into comments with a certain mind and expecting the usual.
Then BOOOM, there is this one comment that does the unusual - it is not what you expected.
I don't have much experience here on Steemit but I think sometimes passionate comments work, sometimes humorous, sometimes self denigrating but they need to be a bit unexpected. No formula available here, just a half-assed observation ;-)