Agree with Jordan's comments on crowds. Shrink your personal space and expect nudges and bumps as a matter of course.
I had an interesting experience at the Golden Computer Centre, a massive comglomeration of computer vendors piled in together in a 2 story building. I purchased some software for some silly amount like $4 a piece, and was told to come back to the stall in 20 minutes. When I returned, an old man led me through the back hall, we went out a side door, crossed the street, went up half a block, and then he started to go in a tiny hall with stairs leading up. At that point I halted and started to say enough was enough, but then someone else came down with the stairs and handed over a small paper bag with a couple of warm CDs in it. Hmmm.
Anyway for sights, check out the southern area on South China Sea. Repulse Bay has a nice beach, Stanley Market has brand name soft goods and fine linens for dirt cheap, the waterfront walk at Stanley is very european with cafes and restaurants. There's a water community in Aberdeen. Although much smaller because of government efforts to relocate families to land, when I was there in 2004 there were still six women who had never set foot on land. Ever. Market boats travel within the floating community with produce and goods and sell. You can take a boat tour through the "neighborhood", on the same boats that take you out to the Jumbo floating restaurant.