This Top 10 list finally arrives by popular demand. Though unfortunately I can't speak from experience, some friendly neighbors happen to be experts on this topic (and apparently have a lot of mayonnaise around). Here is the list we came up with.
As always, in no particular order:
1. Sloppy Joe (unless you're eating off a guy named Joe. Then it would be funny.)
2. Fruit Salad
3. Egg Salad
4. Flavored Cream Cheese ( I don't even like it on bagels)