Any food at buffets is never hot enough. They always tone it down for the masses, and it ruins the taste.
Sichuan (Szechuan) chicken
Hunan chicken
Mu Shu (Moo Shoo) chicken
Bird's Nest Chicken (wrapped up in a big messy thing, and slow-cooked)
I didn't care for 1000-year old eggs, which are a delicacy.
I had Peking duck in Beijing that was excellent. And my wife had a Lemon Chicken (which I would never order) at the Hong Kong Marriott that was fantastic. Luckily for me, she couldn't finish it.
We also had a 20-course meal at a Chinese commune (this was in 1984) that was unreal. I counted the courses - they started with 4 appetizers, so I counted that as 4 courses. I was wrong, that was only 1 course! Almost everybody was stuffed halfway through the meal. Of course I forced myself to try everything. Knowing what 98% of the country was eating did provide some guilt - but this was on a packaged tour with an escort from the Chinese government always present. Tourism was in its early stages, and they were trying hard to make the tourists happy while keeping a close eye on us.
After 11 days of true Chinese food, when the bus pulled in front of our hotel in Hong Kong (still British then), everybody went straight across the street to the McDonald's. Except for my wife and me.