God Is Snippy?
Source of the page quote, and possibly the trope namer. In the pilot of "Joan of Arcadia," Joan questions the boy who states he is God, wondering about the fact that God would be snippy with her. He explains that he's actually not like what she sees, that she's comfortable with snippy, so he's taken that form. He tells her that in fact he has a great personality and she'd like him.
A Form You Are Comfortable With