Mmmm... M&M's, I love them. They're one of my favourite chocolates of all time.
As far as I know there's
A) Normal M&M's
B) Crispy M&M's
C) Peanut M&M's
D) Shrek II Crispy M&M's
E) Black and White Normal M&M's
F) Black and White Peanut M&M's
G) White Chocolate M&M's
H) Peanutbutter M&M's
Am I forgetting any? My definate favourites would be Crispy, Black and White (both) and Peanut.
((Edit: I've added Peanutbutter M&M's. Some M&M varieties aren't available in other countries.))