Choosing the right voice is vital. Much of a character and its personality traits can be quickly established by the performance of the actor behind the drawings thereby taking a huge load off the animator. If the real-life actor who is supplying the voice to your drawings understands the part, they can very often make significant contributions to a scene through ad libs and asides that are always ‘in character’. If you have given your character something to do during the delivery of their dialogue, you must inform the voice talent. If your character is doing some action that requires effort, for example, that physical strain should be reflected in the delivery of the line.
Just as the designs for any ensemble of animated characters should look distinctive, so should their voices. Heavy, lightweight, male, female, husky, smooth or accented voices are some of the dialogue textures that need to be considered when thinking about animated characters. Using professional talent who can tune and time their performance to the animator’s requirements usually pays dividends. It is immensely inspiring to animate to a well acted and delivered dialogue. It is interesting that if you ask practicing animators about what they actually do, most will describe themselves as actors whose on-camera performance is realised through their craft.