My wife has been cooking Thanksgiving dinner for both of our families for close to 25 years. She has a lot of regular sides, but likes to sneak in something new every couple of years. The list just keeps growing, because we are not allowed to remove anything. Besides the two turkeys (1 roasted, 1 smoked), mashed spuds, gravy, dressing, cranberry-raspberry sauce, yeast rolls, muffins and 3 desserts (never the same), our favorites are:
Sweet potato casserole
Sweet corn souffle
Frankly, I have trouble finding room for the turkey.