Organic Greek yogurt with whatever fruit you want to add in is great for me and also steel oats(oatmeal)and fresh fruit with a little brown sugar is a great energy boosting healthy meal as well. Eggs are great. Cereal is LOADED with sugar and not good for breakfast really(unless your buying a really healthy type of cereal). If you have an energy consuming day ahead which most of us do, breakfast is important for anyone. Your body needs fuel after sleeping and not eating for the past 8-12 hours before.(assuming you dont eat right before bed because that's not good for your health/body fat either)
I eat breakfast every day, always some type of eggs, whole wheat toast and a bowl of oatmeal. I eat three times a day, pretty much the same things with very little variation and nothing in between. (I eat quite a bit at each sitting) It works for me, I've maintained my body weight, waistline and overall physique since about 18, I'm 46 now. I also drink mass quantities of beer and wine. I also am very fortunate to have great genetics as both my parents are in great health and very fit.
I have a smoothie with whey protein, strawberries, banana, and skim milk. I've had this every day for about six years now and I never, ever get tired of it. Partly because I don't have much appetite or interest in most breakfast food. Also if I want to work out it's much easier after a smoothie than after something heavy or starchy.
Once in a blue moon I'll indulge in something like bacon, waffles, whatever, but that's if I'm not going anywhere for a while, like if I'm in a hotel. Have never been a big fan of eggs or oatmeal but those are good alternatives if you like them.