Priceless...
People facing discrimination- we were trying to rent a flat together (since we won't all be there at the same time) and the landlord wanted an illegal three months' deposit. Because we are foreigners...
Complaints about food...
Complaints about locals...
The kind of stuff I have dealt with as a serial expat, they are experiencing for the first time- for at least one woman in her mid-30's it's the first time she has lived away from home at all.
Culture shock! I had one person tell me how she thought it would just be the same but...it wasn't. (Even in the US moving from one region to another is a culture shock so we know moving from one country to another is a HUGE culture shock).
Even though people are generally happy to be in Taiwan, it is fascinating to watch them become first-time expats...