In terms of writing characters or stories, at least initially, there's no difference between live-action and animation. A good story is a good story, whatever the medium.
We have the freedom to excel or inhibit our potential. You are the grand designer of your thoughts and emotions. At some level or another you are the one who chooses which thoughts to accept and which ones to ignore. That can be a very empower realization.
The number one metaphor I have in my mind for writing a screenplay is that...you're trying to climb a mountain blindfolded. And the funny thing about that is, you think, 'Okay, that's hard because you're climbing up a rock face, and you don't know where you're going, and you don't know where the top is, you can't see what's below you...' But actually the hardest part about climbing a mountain blindfolded is just finding the mountain.
In live-action, writing, production and editing happen in discrete stages. In animation, they overlap - happening simultaneously. This allows a real dialogue to occur between the writer, the director, the actors and the editor, and it makes the writing process a lot more collaborative and a lot less lonely.