I can't believe what I am reading here. Someone is visiting Hong Kong, and you are telling them to go to crappy fast food joints where people only go to by "default". The food at these places ranges from "acceptable" to "terrible". Some are better than others (Cafe de Coral is probably the best, MX/Maxim is the worst, Fairwood somewhere in between) but still not worth your time visiting if your trip to HK is limited.
I just came across
this blog that has some decent suggestions for places to eat. If one is visiting Hong Kong for a short time, there are an infinite number of places to try out. And
none of them should be fast food joints.