Now that I am retired, I alternate, cold one day, hot the next. Hot as in eggs.
When I worked, it was always cereal. Sometimes hot oatmeal, since that only takes 90 seconds in the microwave, but I never took time to cook. When you get up at 2 am to be at work at 3 am, you get up as late as you can, and cut as many corners as you can. Now, the 15 months I worked at home during the pandemic, I got up at 2:50 am, logged in by 3 am, and could fix hot or cold breakfast while working.