Like Wolff, I find myself saying "a ya" and "a yo" - easy to pick up and quite expressive, I think. But I have not yet stooped so low as to drink water of any temperature. Water is for washing, in my humble opinion
What else in the Chinesiest category .... well, I've become a baijiu devotee even though the smell of it made me feel ill when I first arrived.
I now feel fairly relaxed about leaving uncovered food out of the fridge for several days on end.
I hold the baby over the waste bin if she looks like she needs to relieve herself.
I push and shove my way to the front of any crowd (this one took me a few years to achieve without feeling bad-mannered).
I sit outside a bar on occasion and allow myself - this one was the most difficult for me - to have my shoulders massaged by a man. He's an ugly but nice guy in his 20s, and to stop him would offend him so deeply. But yes, it took some getting used to!