Being a constant copy cat and trying too hard just shows a lot of insecurity and we all know cool=confident.
Humor is cool but needs to be kept in check. Too much and it loses it's appeal.
Being kind and polite even when faced with the most rude and boorish individuals is waaay cool.
The funny thing though is human beings actually find being called contrasting adjectives like "cool" and "hot" to be compliments!