Wikipedia defines common sense as “knowledge, judgement, and taste which is more or less universal and which is held more or less without reflection or argument”
Try to avoid using this topic to express niche or unpopular opinions (they’re a dime a dozen) but instead consider provable intuitive facts.
Folk idioms that contradict each other are my favourite. For example, “the cream rises to the top” vs. “it’s not what you know, it’s who you know”.
Good call, I’ll start looking out for these!
“The squeaky wheel gets the grease”
“The nail that sticks out gets hammered down.”