Taxis in Korea
There are two different kinds of cabs in Korea. cheap cabs and luxury cabs (black). The cheap cabs will get you there fast and cheap. The black luxury cabs are also fast but you won't be quite as scared.
The cheap cabs are really inexpensive and late at night or on long runs the driver is open to negotiating the fare.
Don't get too upset if a cab driver goes past you when you're flagging him down. Even thoug hhe may not have a fare he might not be able to speak English or there could be a multitude of other reasons that he might fly by you and stop a block away to pick someone else up. Don't take it personally. Take a deep breath and try for the next one.
You do need to be wary when taking a cab. The odd driver has been known to take you on the milk route. That's often why negotiating a fare in advance on a long run is often a good idea. A good way to prevent any troubles is to be obvious about making sure hte ID picture of the driver matches the person driving the cab and make sure they realize that you made a mental note of their number. Realize that this happens all over the world and again try not to take it too personally.