[TalnSG]

Of England, France, Germany, Spain, Mexico, Canada and various parts of the U.S., I would say England - especially London. They are the best.

Mexico City has great ones, but you have to be very careful to be sure they are actually licensed taxis. Its a very serious risk otherwise.

New York's are efficient - most of the time, but when not they are really impossible.

Dallas - forget the idea unless you are forced. Seriously, most of them are rude, ignorant and more expensive than anywhere else on the planet. There is a good reason I have an annual pass for mass transit and my own car. Need to go to or from the airport? Call a friend and bribe them. It's my unoffical hobby.