in reply to
The best thing about whoppers is...
Not to be pedantic, but it's in my nature: it's the Big Mac that consists of "two all-beef patties, special sauce, lettuce, cheese, pickles, onions on a sesame seed bun". The Whopper has one big patty (unless you get a Double Whopper, of course)....
I think that the Big Mac uses the two tiny "regular hamburger" patties because Ray Croc was trying to simplify preparation -- only one size of patty to grill. The Quarter-pounder was introduced after his death, IIRC.