I think you covered most of the most commonly asked questions, but some other ones that I get are:
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In Taipei for (insert time interval), what should I do?
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Visiting and going around Taiwan for 7-10 days in (insert month), is that enough time to see all sights? What should I pack?
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How do I buy a train ticket online?
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Cockroaches can fly?!?!?!?!?!?