Vanity is not a fault from which RESCUE RATCHET typically suffers. He is more concerned with saving the lives of his fellow AUTOBOTS than with what they think about him. He's never paid much attention to the decorations adorning his vehicle mode. However, after discovering the tendency for human rescue vehicles to be decorated in certain ways, he started paying more attention to his appearance. His new paint job helps him fit in, and allows him to help more humans than ever before. Plus, these new decorations just seem more natural somehow.