You shouldn't have any problems as a single traveler to Hong Kong. Nearly every time I come here, I travel alone. The biggest problem is one of expense, since many hotels charge the same regardless of whether it's for single or double occupancy. The other problem is Chinese food -- it's best when enjoyed with a group. Try fixed-price meals or all-you-can-eat buffets when dining alone, or join one of the organized tours where meals are often included.
Female travelers may also want to check out the website Journeywoman (www.journeywoman.com), a "real-life" women's travel information network where you can sign up for a free e-mail newsletter and get advice on everything from etiquette and dress to safety. They have a special section called "GirlTalk Hong Kong," which carries tips on accommodations, restaurants, shopping, things to do, what to wear, and details of venues where solo female travelers will feel at home, submitted by women who have traveled to Hong Kong.
Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.