It's pretty humid in Taipei. We happened to be there for two weeks where it didn't rain, but it seems pretty stormy other times. One really interesting thing was all the open-air areas. Restaurants would be doorless and have seating right outside which made it feel all the more welcoming. It's probably a result of the lack of really cold winters. Bathrooms would always have their sinks outdoors and schools would have hallways that opened outdoors.
Not a lot of foreigners
Maybe I'm biased living in New York but Taipei didn't feel like a very "international" city. There's definitely a lot diversity within the population in terms of age, dress, etc, but it never felt like the melting pot that is New York.
The subways are so modern
The subway system in Taipei is extremely orderly. People would queue in lines before entering the trains and oftentimes wait for the next train even though the cars could definitely fit more people. There were gates that would have a flashing light to indicate that a train was approaching the station. Trains were never more than 3 minutes away, and the stations all were labeled with both Chinese and English, which was super useful for me.
Air pollution is pretty bad
I would always notice a decline in air quality during rush hour. It's not something I think about while walking around in New York, but I definitely was aware of it in Taipei. My theory is that because of popularity of scooters, a lot of vehicles with poor emissions are on the road. It was pretty interesting that the evening news would always talk about parking problems. A lot of the residential areas simply wouldn't have sidewalks to people, cars, scooters would all have to share the road.
Family is the best tour guide
My relatives showed me around all the best places to eat and sights to see. It was really an amazing experience for someone like me who can't read/write a lot of Chinese. Chinese is definitely something I want to get better at reading. We also went to the spa one day, which was something I had never experienced before, but really enjoyed.