Just curious, how many hours go by between the time you wake up and your first meal (first feeding, first intake of calories, whatever we want to call it)?
How important is it for what?
For dropping fat? Not very important. Forms of intermittent fasting seem to work well for cutting.
For adding size? Kind of important, because it gives you more time through the day to get your calories, but certainly not mandatory.
For health, meh. I wouldn't discount what DD said. I'd just put it breakfast in a "take it or leave it"-category instead of saying whether it's "important" or not. You could probably make the argument that a macro-dense breakfast with greens, healthy fats, and quality protein might, in the long-term, be as healthful as the low calorie/IF approach.