I'm in central Virginia - and always have been. Generally, we have always have the "standard stuff" and we always had sweet potato pie. Then, I met my husband who is from California . . . and Mexican American . . . he always had pumpkin pie. Now, I usually have pumpkin pie but I make sure that I get my sweet potato casserole. Occasionally I will make a sweet potato pie at Christmas because we used to have the same basic meal for Christmas that we have for Thanksgiving. We've now changed that up a bit so that no one has to spend Christmas day in the kitchen.
Another thing that started with my husband was the addition of black olives. They had olive trees in his yard in California and apparently put olives in almost everything!! He always makes the stuffing and adds black olives to it - which is WONDERFUL!!! Also, he likes for me to make potato salad with black olives (and boiled eggs). Everyone raves over it. My favorite potato salad is one that I make with fresh dill (and no eggs) - so I make both which makes everyone happy.
In addition to all of this, my sister married an African American and we now have collard greens at all holidays, as well!! We have the best of all the worlds!!!!
And we usually have ham, as well!