In my experience, London taxi drivers are the top for being able to find where you want to go. But London taxis are also the most expensive.

New York taxi drivers are the scariest drivers: more than once I've nearly asked the driver to stop and let me out.

Singapore taxi drivers are the chattiest in my experience, but — oddly perhaps — they don't generally worry me when they do chat. (Usually I hate a talkative taxi driver, especially if I'm on a business trip.)

I've had two very bad experiences with attempted over-charging in Prague: I don't know if my sample size is big enough to say that this is normal.

Istanbul taxi drivers often don't seem to have a clue about the geography or layout of their own city.