I hate to be facetious but don't a lot of tourists use the MTR to travel in Hong Kong already? I understand the premise of your site is a travel blog built from the ground up using the MTR as a reference point for tourists, but most HK travel guides recommend the MTR anyway.
Moreover, I think your "suburban" label of the places you've visited is inaccurate because that term isn't really applicable to Hong Kong. The closest thing I've seen in Hong Kong that resembles a suburb is a gated community like Beverly Hills. Most other residential apartments in Hong Kong are public housing estates or private developments, which are mostly in urban areas. If you don't live in an apartment or a gated community in Hong Kong, chances are you live in a village house, which is a village and not a suburb. I'm not trying to argue semantics here, but if you ask most Westerners who've actually seen or lived in a suburb, I'm sure that the majority of them wouldn't call the high-density apartment complexes suburban, which makes your site a little misleading. Moreover, all of the places you've listed are urban anyway.
Regarding the site itself, I think your pictures are nice and I enjoy the narrative writing style. However, your photos are too big and it takes too much scrolling for far too little information. I also think you should focus less on reviewing restaurants because that's already been done for you on Openrice. Moreover, your destinations are lacking a lot of content because there is much more to do in Tai Po than just the market and the museum. Overall you could do with better formatting and much more content.
As it stands, your site just doesn't have enough information to be a travel reference, but as a personal blog it's perfect. I think that this is quite a good start into web development and I wish you all the best with it.