Tuesday night is my bowling night at Pin-O-Rama. It is also my "guilty pleasure" night when I consume my weekly bag of M and M's. I'm not alone in my craving as M and M's are the world's most popular candy. The question is, what kind of M and M is the best selling one.?Mars Inc., the makers of M and M's are well known for their secrecy so actual individual sales figures are hard to come by. As for myself, I go for the M and M Peanuts variety. I don't have any peanut allergies and somehow I feel that the peanut adds an element of nutrition. M and M's have been around since 1941 and have seen other candies come and go so there must be something special about those little round hard shelled treats that always make us come back for more.