In my house, I'm not sure that there's many things we don't freeze.
Like others have suggested, big batches of soups freeze well. I'd suggest storing some of it in individual portions and others in family-meal size portions, that way you're not thawing a giant soup for lunch for one or trying to combine a bunch of little portions for your family. My family also doesn't freeze cream or milk-based soups (like my mom's potato soup), because we decided it didn't heat well.
Casserole-type meals, like lasagna or enchiladas or any other casserole, chili and spaghetti sauce.
Cheese!!! My family eats SO MUCH cheese! So we buy tons of it on sale and just throw it in the freezer. In fact, we don't just store cheese in our freezer, we hoard cheese in our freezer. Right now, I think we have somewhere in the realm of 6 bags of mozerella alone in the freezer, and that's low for us. My mom makes homemade pizza once a week, too, which is part of why we freeze so much cheese.
We freeze pretty much anything that could be considered a baking supply. We freeze butter, chocolate/peanut butter/butterscotch chips, almond bark, chocolate stars, M&Ms, and almost any kind of nut you can think of. We don't always have all these things, but whenever baking items are on sale we stock up and freeze. These things can last forever in the freezer.
We also freeze bread. I'm horrible about this--when I cleaned out my minifridge at school before Christmas break, there was still a quarter loaf of bread I bought to make toast back in September. Just to see if it was still good, I toasted a piece and tried it. And yes, it was still good. At home, bread doesn't usually last in the freezer that long, but we usually have some bread in the freezer.
We freeze any type of breakfast bread we eat. Right now, I think we have leftover French toast and blueberry muffins in our freezer, but we also freeze pancakes, waffles, pumpkin/banana/zucchini bread, muffins of all varieties, etc.
We freeze broth, and ham bones for soups, along with every kind of meat we eat. We also freeze leftovers.
We freeze bread crumbs and crushed crackers that we use for breadings or toppings. We also freeze snack cookies (Oreos and such), both crushed and not, for various desserts.
We freeze cookie dough, pizza dough, bread dough, brownie batter, pancake batter, and almost any other kind of dough or batter.
We have in the past frozen various types of desserts, including leftover Christmas cookies, brownies of all varieties, and bars. I think the strangest dessert we've ever frozen is birthday cake. Leftover birthday cake actually freezes surprisingly well, and one year we had part of my cake till nearly Christmas (my birthday's in August), and it was still edible.
Homemade pizza freezes well. Pizza crust (parbaked) freezes well, too, if you want to make the crust in advance. Just be careful about thawing/baking times with a parbaked crust.
Coffee freezes well. No one in my house drinks it, but my grandparents love it, so we always have some in the freezer for when they visit.
That's all I can think of off the top of my head that we freeze. I'm sure we freeze more stuff, and we've frozen other things too in the past, but those are our usual freezer items. I think it's possible we have a freezer problem
