I've been to HK and loved it.
High Tea at The Peninsula is a must.
Symphony of Lights at 7pm, Kowloon (near the Clock Tower)
The Peak overlooking Victoria Harbour, use the funicular railway.
Lamma Island for the Seafood, you can walk from one side of the island to the other in 90 minutes.
Lantau Island has one of the largest Buddha statues in the world.
Check out Trip Advisor for nice restaurants, there are so many to name!
Nan Lian Garden, Ten Thousand Buddhas Monastery, Ocean Park, Cheung Chau Island...oh and make sure you use the Star Ferry!