What cereals would be acceptable under the criteria of Great Breakfast? Are there breakfast that taste good, keep well, and can be pre-prepared?

Corn flakes are the fastest and seemingly the tastiest, though of course, even if it takes more time to prepare, the whole grain oatmeal is healthier.

Something that has eggs and some sort of bread. Some fruits or nuts take it to the next level. You can also have a protein drink. Do not have something you don't like because you wanna start the day with a bad mood.