The best part about the holidays is tradition. There are certain classic dishes that show up at each family's table, which is what makes going to other people's family's houses for Thanksgiving. Maybe they make their mashed potatoes really weird or with the instant mix. But you might go and it turns out you just realized your grandma has been making them wrong all along!
Additionally, different parts of the country have huge variances in what they serve. For instance, weirdo Yankees put cheddar cheese on their apple pie. A map has been making the rounds of some of the nation's favorite side dishes. Check it out: