Andrea Romano the voice director for the DC Animated Universe
A voice with characer is a term used in the DC Animated Universe. What it means is that when trying to cast for animated shows or movies you look for an actor that has a distinct sounding voice in other words an actor that uses their natural voice instead of using a cartoon sounding voice.
Kevin Conroy the voice of Batman in the DC Animated Universe
Mark Hamill the voice of the Joker in the DC Animated Universe