I see that you don't have meatloaf, tacos, soup of any kind, or turkey, tofu, or any sort of roast chicken. Those are all things you can add to your list.
As far as the tator tot casserole, we have two varieties...one with corn, and one with green beans, and they really taste different.
The key to a lot of flavor in this dish, first, to to make sure you're really seasoning your meat well. Chop some onion to throw in your hamburger, and season it well with salt, pepper, and whatever seasonings you like personally (me, I like cumin, oregano, etc for dishes like this, and for Asian influence dishes, I prefer to use garlic, ginger, allspice, etc.)
Both of my recipes consist of the hamburger, cream of mushroom soup (we have to make our own, but Campbell's is fine), cheddar cheese, either the corn or green beans, onions, tater tots, milk, and as I said, plenty of seasoning.
**I also shop for a month at a time, besides perishables. What I make sure I DO have on hand are a variety of meats, pastas and a variety of rices, good seasonings, always fresh fruits and veggies, dairy, cereal, eggs, and some quicker breakfast foods. From those things, I can always create a meal...the key to variety, for me, is usually in seasonings and representation. Don't be afraid to make your own sauces...every week I have to go out to buy onions, tomatoes, peppers, carrots, etc. I love my blender, I recently love dried chilis (quajillo, arbol, etc...they're so versatile) and last night I made cabbage rolls...so simple! Browned my lean ground pork with onions, green peppers, garlic cloves, ginger, and black pepper, added a bit of vinegar and Tamari, and rolled up in cabbage leaves alone with rice stick noodles. Easy, delicious!