Survey found cheese and pickle sandwich lovers are mostly intelligent.
Our choice of sandwich filling could provide an interesting insight into our characters, the study revealed.
Dr Elizabeth Jones and colleagues identified eight 'Key Sandwich Personalities' after interviewing 2,000 Britons.
Those who enjoyed cheese and pickle were more likely to have a high IQ, while people who like BLT on seeded bread are considered opportunists.
Ham salad on white bread signified a 'forward thinker', beef rolls are chosen by impulsive people and egg mayo by quiet 'home bodies.'
High flyers were more likely to go for a classic tuna and sweetcorn, while sensitive souls preferred prawns on brown bread and extroverts chose chicken salad wraps.
"Personality traits tend to go hand-in-hand with personal habits and routines," the Telegraph quoted lead researcher, Jones, as saying.
"This allows us to match the type of bread and filling a person chooses to have at lunch with a personality group.
"Down to earth people go for White bread, foodies prefer Wraps and people who think realistically pick Wholemeal," she added.