Living and working in Taiwan has been a treat. I've been here for almost ten years and Taiwan is ranked one of the top, if not THE top destination for expats. Taiwan is clean and organized, it's cheap and convenient, and it's full of cukture. The climate is moderate and the people are generally welcoming to foreigners.
These are the pros, so what are the cons? Salaries in Taiwan for working professionals are not competitive compared to China, especially Shanghai and Hong Kong. Living on an island can be isolating in ways you wouldn't expect. Certain archaic beliefs are cemented in the local culture and seem to just stick and harden--like a piece of chewing gum on the sidewalk that turns black. Some of these are the idea that Taipei's acid rain causes hair loss, and that people who go to bars are generally not to be taken seriously, to name a few.
But I encourage expats to move to Taiwan and discover one of Asia's hidden gems. They dubious political situation here keeps Taiwan off the radar, with Japan and Thailand getting all of the attention. That's good for us. The expats who live and work here are not here for sex tourism. Most of them are serious people who come to study Mandarin, start a business, or get transferred to work in the PC hardware industry, where Taiwan is still a leader.
So come for the night markets and food, stay for the culture and quality of life.