I'm a leech on this thread as I don't prepare any side-dishes, but I sure have consumed them (sweet potatoes, cornbread, gravy, lima beans, creamed onions...somebody stop me!) . My consistent favorite is the dressing. The most memorable turkey dressing I've ever had was a chestnut dressing. Beyond that, my mother's mince pie. I was the only one in my family that liked mince pie, which kept me in mom's mince pie for a long time after Thanksgiving.