i live in tung chung and it's wonderful
DB is very much for people who want to work in Central and come home to a manufactured western environment. it's nice, but you could be in a California suburb. Tung chung is more local but with conveniences.
of course, Tung Chung is high rise living, but it's good value for money. Ex, we pay 13K a month, and have 3 outdoor pools, 2 indoor, a squash court, gym, doormen and security guards and a store right downstairs. for fast and easy living, it's great.
DB will cost more,k maybe twice or three times, but it's prettier for sure. their beaches are fantastic, you can sail, and the views are more western in the sense that they have controlled development with zoning and banned cars. Tung Chung's views of the water more urban. But we have mountains and sea views and lots of outdoor hiking and running.
Also: DB you have to roam around in golf carts, no cars- that means no taxis or trains! So late at night it's either ferry or stay in town in a hotel or with a friend.
South Lantau is incredibly beautiful, also, and much more rural. You might have a field of water buffalo and herons grazing together peacefully. But yes, the bus run infrequently and no trains. You can take taxis and drive if you want. Village housing is quaint and many thrive on the rustic environment. YOu will likely be surrounded by trees and mountains. Gorgeous, but yes, not as convenient as the two mega-suburbs described above.
Lamma is divided between local fishermen and restaunteurs and a kind of artistic, bohemian expat community. It's more "authentic" than the sterile DB or highrise Tung Chung. But it's ferry only.
Lots of expats ignore much of Hong Kong island and Kowloon, where there are not bad places to live. North Point, Fortress Hill are very near Central, for example and you can have a mid sized 4 bedroom flat (around 1000 sq ft) for around $2000USD.
The problem with living in these "local" places is that, tho cheap, they are very busy and your view is likely to be another building with laundry hanging out the windows. And very little green space, only small parks with lots of people walking around. Umm, there are lots of restaurants and shops, but all local.
Of course you can also go to the cliche expat areas such as Stanley (long drive) or Sai Kung ( bus ride plus train).
Also, Central/Mid-Levels: Parkview, for example, is a high rise with complete club facilities. Or you could live in an older place. These will be close to work and the kids can play in the club space, but it will be like living on the Upper West Side of Manhattan, but more crowded, more decrepit and no green.
Depends on your budget.