At a restaurant, a small glass of tomato juice and a whole lot of water. Maybe a bloody Mary on the rare occasion. At home it's usually a smoothie for breakfast. And more water.
At Home: Coffee (Maxwell House Breakfast Blend or Folgers) with cream
At WDW: Certainly not the stuff that they call coffee, usually Iced Tea (sweet if I can find it).
Not counting Disney and i looove Disney i had to eat "something" to take my morning meds. All there was to drink in the room besides nasty Fla water was a wine cooler. Now that was a first and last for me. Usually for breakfast either Sprite or rarely coffee.