I make green bean casserole, but I insist on fresh green beans -- no canned or frozen. But yes, I use cream of mushroom soup and canned French-fried onions. I only make it for Thanksgiving and the occasional Christmas.
I know some people consider the sweet potato-marshmallow thing an abomination, but I love it, so I make it... once a year. And I make a small enough batch that it feeds those of us who like it, and nobody who dislikes it is obligated to have any!
The one I don't get is potatoes when there's stuffing. In my world, one hot starch per meal is enough (bread doesn't count). I do a semi-potluck Thanksgiving with friends; this year J. said he'd make the stuffing. T., who was doing the turkey, said, "OK, then I'll just do the turkey and gravy," then brought not only the turkey but another batch of stuffing and a HUGE batch of mashed potatoes.
The stuffings were very different (J's was made with wild rice, T's with bread), and I liked them both, but I didn't even get to the taters -- I bagged my limit on starches with the stuffings!