Ask for an airport view as the opposite side of the building looks over the China Airlines' head office and is very close and dreary. The airport view is not noisy but can relieve the tedium of looking at an office block. Note that the office side is also the front entrance of the hotel and is used regularly by buses and so on to drop off airline staff at all hours.
If you are a plane buff you can walk through the hotel gardens to the air force museum which is really within walking distance) and is free to wander around. They have static old US military planes that are interesting. The museum will close when the next terminal is constructed, which will fill the space between the hotel and the existing terminal complex.
Staff are great and if you have any issues, contact the GM. He is a French guy who response rapidly to requests and comments. I had one and the customer team were onto me the next morning to discuss over complimentary breakfast - and it was nothing serious, just one of those first world issues that plague travellers nowadays.