If you're full of energy then take the train into town and do the Star Ferries.... Peak if you can.. but very busy.
Just wandering the streets is an adventure....try the trolley cars for fun..and local flavour.
Another alternative is Lantau Peak, just next to the airport.... great cable car ride to a theme village in the hills and a giant Buddha...Places to eat and relax in the hills..
Lantau Peak | Hong Kong Tourism Board
Motion... Getting a suit made is easy.. plenty of places to chose as you walk around...