"My greatest strength is common sense. I'm really a standard brand - like Campbell's tomato soup or Baker's chocolate"

Katharine Hepburn's quote is a simple and self-deprecating way of describing her own strengths. She is comparing herself to two widely known and widely-used products, Campbell's tomato soup and Baker's chocolate, recommending that she is a "basic brand" like them. This indicates that she is a reputable and dependable individual, someone who can be depended on to make sensible decisions. Her use of the phrase "common sense" recommends that she is an useful and level-headed person, somebody who is able to believe rationally and make choices based upon what is best for the scenario. Her quote is a testimony to her own self-awareness and her capability to recognize her own strengths. It is likewise a tip that often the most trusted and trustworthy people are the ones who are the least fancy and the least showy.