Never been to Hong Kong, but I did spend 10 days in Bejing several years back.
In fact, at the time, Hong Kong was under English Rule and a large digital clock in Tienimen (sp?) Square was counting down to the exact time when China regained control!
I imagine Hong Kong will have a lot more in common with the Western world than Bejing did.
Enjoy the culture and be prepared for street vendors boldly embracing small-scale capitalism.
One thing I found helpful:
In Bejing, very few people spoke English, including cab drivers. Everyday when we left the hotel, we carried the hotel's business card with us to show the cab driver where to bring us at the end of the day. Also, if you're exploring the town, have the hotel hostess write down your destinations for the same reason.
You'll find out quickly if you actually need to follow this advice, but had I not been forwarned I'd likely still be there looking for my hotel!
Again, the western influence on Hong Kong may make such precautions unnecessary, but it's better to be safe than sorry.
I'd love to go back and take my wife, but she'd never agree to such a long flight.
Good luck, and enjoy!