That is a tough choice because I have several favorites.
Breakfast - either a bagel with cream cheese, or pancakes with syrup. They taste bland without the syrup, sorry.
When it comes to lunch/dinner my favorite used to be chicken nuggets (as a kid, almost every night) but now I have a mix of foods. Pizza, hamburgers, lasagna, and sometimes cod/fish. I'll even take pasta, or rice pilaf.
Desserts - ice cream, brownies
I need to widen my horizons even more when I am an adult. More vegetables basically.
When it comes to fruit, it's pears and blueberries, sometimes blackberries. When I lived in the Seattle area, we had himalayan blackberries all over the place and I don't know how many I picked up in my several years living there. I used to go to a park in Snohomish County where I picked a whole bucket full of them - and ate a bunch, froze others.