My trip in Hong Kong was a fairly simple one, exploring the city and spending a day in Disneyland and another day in Macau.
If this is your first time to Hong Kong, I would suggest you visit the following places (do pick and choose according to your length of stay)
If you tend to have car sickness easily, I would highly recommend you to take the tram up and down The Peak. Though there is a bus which brings you up to The Peak, it can get really bumpy causing one to have really bad car sickness)
If you have not been to Disneyland, I would suggest you visit this BUT do note this Disneyland will be considered small in comparison to others
And if you are visiting Disneyland, do note there are FastPass available for certain rides which allows you to jump the queue. Do check with the counter on this when you purchase your tickets
This is where the main shopping district is. If you are not into high end shopping, I would not recommend you to visit as it is just like any other high end shopping area
If you have an additional day to spare, do visit Macau where you can catch a ferry over
There is not much to see in Macau except for the ruins of St Paul and probably visit one of its casinos (just to get a feel of it)