You can decide based on size, cost, beauty, or anything else, but you must choose just one. Many will play; only one can win.
This is, quite obviously, a site about cars. The sad reality for many of us, however, is that we don't get to drive our cars (if we even have one) everyday. Many of us live in major cities, meaning public transport is a fact of life as much as we'd rather be behind the wheel. But if you've got to head to work on an underground train, where's the best place to be doing it?
My biased answer is the Stockholm Metro (or Tunnelbanan, if you will). There are a number of reasons for this, which I will enumerate here: 1. The Kungsträdgården Station has bizarro-world sculptures as you enter and exit. 2. Many of the stations have exposed rock ceilings. 3. The woman who announces the stations has, perhaps, the most pleasing voice on earth. 4. The trains are blue, which is fun, right? 5. At the end of the line, the display inside the trains reads "Slutstation," which quite logically means "End Station" in Swedish, but is nonetheless hilarious to me, because I'm very mature. 6. It provides a very smooth ride.
Clearly, with all my logical points, I have made the winning argument. Regardless, leave your suggestion in the comments below. Tomorrow you may find your choice on the list of "The Best Subway Systems That Lack A Slutstation."
(QOTD is your chance to address the day's most pressing automotive questions and to experience the opinions of the insightful insiders, practicing pundits, and gleeful gearheads that make up the Jalopnik commentariat. If you've got a suggestion for a good Question of the Day, send an email to tips at jalopnik dot com.)