Growing up, it was a big bowl of oatmeal almost every day.

In my twenties it was a rotation of grilled cheese, sausages, omelettes, and sometimes oatmeal (especially if it's cold) though on weekends I would skip breakfast until after my morning ride which could be several hours or more.

These days, its likely to be a can of ensure to tide me through until my meal for the day. Oatmeal would be nice but milk's too expensive, and making oatmeal with water is just disgusting.