This is called appetite fatigue. Young children and older people are particularly susceptible to it. Store less wheat than is generally suggested and put the difference into a variety of other grains, particular ones your family likes to eat. Also store a variety of beans. This will add variety of color, texture and flavor.
Variety is the key to a successful storage program.
It is essential that you store flavorings such as tomato, bouillon, cheese, and onion. Also, include a good supply of the spices you like to cook with. These flavorings and spices allow you to do many creative things with your grains and beans. Without them you are severely limited. One of the best suggestions I can give you is buy a good food storage cookbook, go through it, and see what your family would really eat.