What's so particular about hanger feng shui?

A little, but not much. Mainly depends on the material. You can consider it scientifically, for example, don't put it on the bedside and at the door, otherwise it will be inconvenient, and you will feel that there is a shadow watching you and affecting your sleep mood, or the windowsill will block the wind. As long as these are considered, Feng Shui will be fine. In fact, Feng Shui is some experiences summed up by our ancestors.