Hi, Deena,
Your question made me think over, and to be very honest, I answer it from my deepest heart.
As you read my sub-goals in the first post, I have weight problem from very young. At the age 6-8, I had definitely healthy weight in the U.S. standard, but compared to my peers/classmates, I was fat. My brother is 2.5 year older than me, but I was ~5kg or more heavier than him. He's just too skinny, but that's just a little abnormal in China by then, I was more abnormal. I gained my weight by 10kg per year from roughly 10-12 year old, as well as growing taller. By the time I entered junior high, I was 1.60m and 72.5kg, compared to 40-45kg of my fellow classmates. I was so embarrassed as teachers/relatives started to say I should lose weight! I still remember a teacher asked me be out of the classroom, and taught me some exercises to tighten thighs. It's too embarrassing to a 10 year old!
72.5kg was kept for three years in junior high, and suddenly reached 80kg in my high school and was kept for roughly 10 years. Consider most of my fellow gal classmates were just below 50kg! (yes, they are most shorter than me as well.) Ok, if the weight doesn't make much sense to you, let me give you the dress size, they are in size 0 or less as they become adults. If you could read Chinese, and went to a discussion board on weight lose in Chinese, ladies there are discussing how to lose from 120lb to 100lb even they are taller than me. I am just helplessly way out!
Why I summary my history is that, I have been so embarrassed with my weight and built an attitude as "let it be", and "I have to live with my weight problem all life long". This is very bad. That's why when I started to gain weight, instead of doing something, I chose to hate myself and do nothing.
Another problem is that though I am obese, I still have relatively strong muscles, if I chose to work out to lose weight, I chose to go extreme instead of going slowly. Then I had shin pain and heel pain after several months and then stopped and gained more weight!
So the first reason for my weight problem is my attitude, I have to admit it.
The 2nd reason is the life style.
1. less exercise. I used to ride bikes as the way to commute and go shopping in China. We bike slowly but constantly. 30-40min one way is considered 'bikable' distance for daily commute. The average biking time is more than 1 hour a day. I didn't think it an exercise until I lost the tight muscles from my thighs, as I drive to commute everyday now.
2. Food. When I first arrived in the U.S., I did eat junk food, (and sometimes now.) You may laugh at me, but it's true that I even have not finished trying every new food to me now. Chips, icecream, fast food, I did try them in different brands. And of course they taste very good! Even I know they are bad and avoid them, for some time, I overeat nuts! (peanut/walnut/sun flower seeds...) I also overeat carbs. Noodles are easiest way to cook. When I come home late, I just boil the water, at the same time, I prepare the vegetables, and then send all to the pot. Within 10 mins, I can have a dinner with lots of noodles. That makes me really full and then I feel better. And after saying how many vegetable I eat, I'm not a vegetarian, I do eat meat. As friends say, I'm a good cook. And I am a single, I cook sometimes just for fun or passtime. Here's my patten, I cook a meat dish, it's delicious for sure, but nobody to share, and I keep 'sample" it, and it won't taste good when reheated, so, I eat them all. This is usually at night and after my dinner.
That's my problem on portion.
To straight out your question, is there any particular food I don't eat in China but eat here in regular basis? I don't think so, nothing new is on daily basis if I cook for myself.
The 3rd reason is stress. Stress from working place, from relationship, as everybody here has. But I probably feel more lonely than you do. In the first year I was in the U.S., I gained probably 20-30lb under combined pressure from graduate school and loneliness. When I feel stress, I am more likely to overeat. And as I recall the time I gained weight, I did eat junk food, for example, go McDonald's for quick dinner solution if I need to work overtime.
So, writing down the problems I have is to remain myself what to do and what not to do.
For you, Deena, I don't think there is any particular food we shall eat or not eat, all is 'common sense' in the world of weight loss.
We shall,
1. accept and love our bodies no matter what;
2. manage stress and not use food as a comforter;
3. watch the portion and the nutrition, spend time to take good care of ourselves, physically and mentally; and,
4. build exercise into daily life.
Hopefully, this answered your question. And I am so sorry that I write slow, it costs me 2x or 3x time when I write in English..

And writing this in English is stressful too.. I put several walnuts into my mouth while writing...
Best!!!
RLR