And the MTR is SUCH fun with a stroller. Enjoy.
To the OP - if you are from the UK, then imagine Oxford St in London during the sales. Then make the pavements narrower and the people less watchful of where they are going. Then go walking around with your stroller is like that. It's like that ALL the time, pretty much anywhere in Central, Admiralty, Wan Chai and many other places in HK Island. Also anywhere else there are many shops. However, in places like GC, Park Island, Discovery Bay, there are generally less people, more space and more other mothers with strollers. That's really all we are saying, in a nutshell. Plus those places are easier for your husband to get to work. Nowhere in HK is actually far from shops, supermarkets, cinemas or other conveniences. It's more about the general atmosphere of your basic surroundings.