A reasonably priced hotel --- this is where I always stay in Taipei. You can find fancier rooms in the city, but Just Inn Taipei is good enough for solo travelers. It is very close to train stations, convenience stores, restaurants, food carts, and night markets. The front desk is open 24 hours, which can be very important in case of any issues.
Very conveniently located. A few minutes walk to the TaoYuan Airport Express train station. Right next to Photography Museum. Walkable to National Museum. Rooms are very small. But the interior design is very cool and it reduces your stress. Overall, pretty good for the price.