When running a game do you prefer a character to have a role-playing reason for multi-classing?

@JeremyECrawford When running a game do you prefer a character to have a role-playing reason for multi-classing? Not just for an ability.

— Steven Connor (@Mazoshi1987) October 25, 2016

As a DM, I prefer choices in my game—whether made by me or my players—to be motivated by story and entertainment first, not by rules. #DnD https://t.co/Qi8WOCE2iT

— Jeremy Crawford (@JeremyECrawford) October 25, 2016