Anything that needs to be canned in a water bath, and anything you want to make too much of and freeze.

Corn on the Cob is nice to do in large pots. Also I have boiled ribs in a pot before putting them on the grill for a quick crisping. BBQ enthusiasts would disagree with this method. I am assuming you don't cook for large groups of people, but if you do curry works well as well as pasta.

It should fit a decent sized turkey for brining too.

I use mine to make a big batch of chicken and dumplings. Yummy!

mmmm..... make homemade pho! even though big bowls of it are super cheap at vietnamese restaurants, homemade pho is soooo good!

Double-batches of soups - half for eating and half for saving for later. I can never make enough chicken tortilla soup because it goes so fast, so I usually have to pull out the big pots for it.

We use ours to brew beer. Anything smaller and you end up with boiled over beer and a burning malt smell anytime you use your stovetop for anything else.

Steam veggies and fish by using a folding steamer basket in the bottom.

Menudo

I was about to say similar to m_j_s, there are many universal steamer inserts available for large pots. I got one for mine to steam veggies. Otherwise, canning is good, I don't ever brine my turkeys but I suppose it would be good for that too, as caedstrom said. I know I use mine when I make a wedding cake or a cake particularly large so I can mix up batches of frosting and dump them all in the large pot (its bigger than my biggest mixing bowl) and with the lid, made it easy to store between when I make it and use it.

i always use bigger pots in cooking to avoid spillage all over the stove....

LOVE the turkey brining idea....we are hosting Thanksgiving this year and plan to brine the bird ahead of time. Will have to check to see if the pot will fit in my cooler as I don't want that large of a container taking up all of the precious fridge space.

rosebud- depending on where you live, if it has a lid you can secure and the temperature is right come Thanksgiving you can leave it outside on your porch. Just be sure the temp is cool enough for it to stay safely kept cool.

I use mine to make huge batches of pasta sauce that I then put in jars. It is a lot easier than you would think. I just pour the boiling sauce in the jars, add the lid (new every time), and a clean ring. The seal themselves- you can check after they are cooled to make sure there is no play in the lid. The sauce will last in your pantry for a year.

Steam a big batch of tamales!

Ina Garten's chicken stock recipe is the way to go. Easy and delicious. And makes your house smell great. Have fun!

Brew beer!

canning, applesauce, pasta cooking (allows pasta plenty of space, which you don't get in the smaller pots (3-ish quart pots) usually used for pasta)

@nienie: You really can't store food that way! It is VERY unsafe and was known as an outdated method prior to WW1! All canned food must be processed in a water bath canner or pressure canner dependent upon which food.

Astur: what? How nienie described is how I grew up canning food with my mom.