Thanksgiving lunch - our house with my mom and her husband. They are older and she is having health problems so she cannot visit her brothers and sisters for the holidays. She also would not be up to hosting anything.
Thanksgiving Dinner - my husbands relatives (mom, brother, aunts & uncles, cousins, etc.). Usually a big to do and a good time to reconnect and see them.
Christmas Day and Dinner - our house and anyone who wants to come is welcome. Sometimes we just have our moms. Sometimes we end up with 30 people. We started this tradition soon after having kids because kids want to stay home and play with their toys on Christmas.