I think that this logo for the Walt Disney company has been very successful.  Since the type was based on Disney’s own handwriting, the type is unique and simple, which has allowed it to continue to be used throughout several decades.  The curviness and playfulness of the letters represents the company’s themes of youth, happiness, and fun.  Since the type is simple and thick, it allows for it to be altered in many ways according to how it will be used and for what product.  For example they can change the color of the letters easily or even put illustrations in the letters.