Oatmeal, buckwheat pancakes, french toast, eggs, ham and eggs, yogurt or cottage cheese with fruit or maple syrup, fruit, avocado, smoothies, rice with peaches or raisins topped with cream and honey, and combinations thereof. Oatmeal and smoothies are the two most frequently served. Eggs are often an evening meal for us, or snacks during the day, so they are not often on the breakfast menu. Yogurt is also more of a snack food here, but does make it to the breakfast table, too. DD and I are the ones that eat avocado for breakfast, mostly because we'd eat an avocado any time of the day or night, if one were available.
My favorite breakfast is a bit ... unusual. My mom used to make it when I was a kid and I've always loved it. It's a piece of toast with cottage cheese and tomato slices on top. Sprinkle with basil and black pepper.
My kids like it, too. Well, okay, 2 out of 3 like it. And DH despises it, but he doesn't like anything that doesn't have an unpronouncable ingredient list.
ETA: My kids are 13, 5, and 2.5 years.