Misc: what was the name of the bartender in the tv series 'cheers'?

Questions

Say Cheese: Yugoslavian origin; salty, appetizer, snack, dessert.?

Say Cheese: Italian origin; mellow; appetizer, dessert.?

Say Cheese: This Mother Goose character was eating what we'd call cottage cheese.?

Advertising: "Progress is our most important product."?

Advertising: He hit the big time after commercials for McDonalds and State Farm?