I admit I don't like to spend much on transportation. In HK I would take the longer and cheaper route. But most usually take the airport express. If you take the cheaper route it does come with inconvenience of having to carry your luggage around every time there's a change of method or station change. Staying at Tsing Yi Island which is near the airport is okay. But if I stayed further like Kowloon or HK, I would rather take the airport express and avoid the crowds, station change and having to move my luggage on and off.