I ask for die rolls in roleplaying either for the lols on flavoring moments that don’t impact the narrative deeply, or when something could and couldn’t work.

For example, my players tried to convince dragons to make business with their own tribe. I had made them roll for Persuasion. Not only have they succeeded, the result was incredible. So from that moment and on and on, one of the dragon is deeply in need of shrooms and their tribe actually produce a lot of shrooms. Since then, that dragon was pressuring it’s brothers and sisters to do trading with the tribe for delicious shrooms. Even to the point of sabotaging communications in an attempt to get more of them.