well, i used to be the same way, when i first started cooking for myself. same thing every day:
breakfast: 2 cups grape nuts, 1 cup milk
lunch: hot dog
dinner: double turkey burger and some rice, cottage cheese
then i graduated to "bodybuilder meal prep": bulk cooking and storage, still the same thing every day.
finally, i started to cook a different dinner each night. this happened when i learned how much i enjoyed cooking. however, over time, i began to put more and more emphasis on dinner, to the point where I was just a few weeks ago... eating nothing but an elaborate dinner.
i came to believe i needed a large dinner, probably because of malnourishment. in fact, i notice how much less thought i give to cooking and eating immediately after a meal.
it's hard for me to balance the different goals of meal preparation: enjoyment of cooking, nutritional need, desire for variety, etc. but this tendency to indecision pervades many aspects of my life, not just my diet.
i think this is largely because i cling to untested beliefs, e.g. 'i can only achieve exceptional leanness if i suffer' or 'i can only achieve exceptional leanness if i follow an extreme dieting strategy'. well, my leanness is probably mostly inherent, and i can probably find a means of eating which gives me a lot more mental stability with little fat gain. this may be something as mundane as eating like a normal person, 3 times a day... i just have to keep trying to figure it out.