Personally, I can't remember any bad ones. I guess that I'm pretty lucky--or I have a bad memory, and I just blocked it out! I do have a best Christmas gift memory, though. When I was about 10 years old, I received a record player. My mom was single at the time, and didn't have much money, but she was able to get me a refurbished record player. To me, it was the best gift ever, and I didn't even care that it wasn't brand new. I used that record player all of the time, and it still holds a special memory.
What about you? What's the best or worse Christmas gift you've ever received?