For me it's green bean casserole and sweet potatoes with marshmallows in any guise. In fact, we don't have sweet potatoes at all -- mashed Yukon Golds and then a casserole of puréed roasted winter squash for us.
No form of jello either.
No pecan pie -- far too sweet for my tastes. No pumpkin pie either. I love pumpkin and I make some other pumpkin dessert -- a financier, a cheese cake, a crène brulée, whatever, something different -- but no pumpkin pie.