According to this iVillage Food Channel slideshow....
They say you are what you eat, so what does your sandwich preference say about your personality? In a study commissioned by Hellmann's Mayonnaise and conducted by the Smell & Taste Treatment & Research Foundation, about 3,000 people were asked to select their favorite sandwich and then take a series of personality tests. We spoke with foundation founder Dr. Alan Hirsch to help break down the results and decode just what your favorite sandwich says about you.