What is the Best Metro/Subway System in Europe?

Over fifty (50) cities in Europe have metro systems from very small ones to mega systems that carry millions of people on a daily basis. What is your favorite system and why? (Is it because it carries a lot of people? It is an old system? The stations are really beautiful etc.) Comment below.

Which city in Asia has the best metro system? Share your opinion here!
   • What is the Best Metro/Subway System ...  

Which European Capital has the best tram system?: Share your opinion here!
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Included are over 50 systems within Europe. Wikipedia was used to provide data such as daily ridership, length, opening year, and interesting facts. Please note that ridership can vary depending on the year and the years used for ridership are not consistent for this video.

Unless noted otherwise, ridership is weekday.

-Data is up to date as of 2018 - there are expansions happening across many systems in Europe, some footage used in the video may be old because it was difficult to find footage for certain systems or I was using my own footage from years ago. Changes are happening to a lot of metro systems and the video does it best to showcase as much up to date information as possible. Metro maps also proved to be a challenge to collect as some systems include heavy rail lines while others don't.
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Unless noted: ridership refers to daily weekday ridership
For complete videos of the system:

Amsterdam:
   • The Metro System of Amsterdam, Nether...  

Athens:
   • The Metro in Athens, Greece - Μετρό σ...  

Barcelona:
   • Metro in Barcelona, Spain  

Berlin:
   • U-Bahn/Metro in Berlin, Germany 2017  

Brescia:
   • U-Bahn Metro Brescia  

Brussels:
   • The Metro System in Brussels, Belgium  

Bucharest:
   • Subway / metro / metrou / underground...  

Budapest:
   • Super Modern Metro in Budapest, Hungary  

Catania:
   • Видео  

Copenhagen:
   • Subway of Copenhagen, Denmark  

Dnipropetrovsk:
   • Поезд метро на станции Заводская - Дн...  

Genoa:
   • Metro Genova Partenza da / Leaving fr...  

Glasgow:
   • This is the Tiniest Subway in the Wor...  

Hamburg:
   • U-bahn in Hamburg, Germany - the Metr...  

Helsinki:
   • The Subway/Metro of Helsinki, Finland  

Istanbul:
   • Istanbul Metro M5 Line | Driverless M...  

Kazan:
   • Казанский метрополитен | Kazan Metro ...  

Kharkiv:
   • Харьковское метро. Салтовская линия  

Kiev:
   • Метро в Киеве: The Metro in Kiev, Ukr...  

Lille:
   • The Metro System in Lille, France - 2016  

Lisbon:
   • The Metro/Subway in Lisbon, Portugal  

London:
   • The London Tube - Metro - 2015  

Lyon:
   • Видео  

Madrid:
   • Madrid Metro - Line 8 - Aeropuerto T1...  

Marseille:
   • The Metro de Marseille, France (Rubbe...  

Metro Bilbao:
   • Spanish Trains  - The Bilbao Metro  

Milan:
   • Metro a Milano: The Metro System of M...  

Minsk:
   • Minsk Metro Ride  

Moscow:
   • Метро в Москве: The Beautiful Metro S...  

Munich:
   • U-bahn (subway) in Munich, Germany  

Naples:
   • Metro Napoli LINEA 1 " Piscinola - Se...  

Nizhny Novgorod:
   • Метро в Нижнем Новгороде - The Metro ...  

Nuremberg:
   • U-Bahn Nürnberg 2016 - The Metro in N...  

Oslo:
   • Oslo T-bane - The Metro in Oslo, Norw...  

Paris:
   • Le Métro à Paris, France 2016 - The M...  

Prague:
   • The Prague Metro/Subway 2011 - Metro ...  

Rennes:
   • [Rennes] VAL 208 Métro - Départ J.F. ...  

Rome:
   • So Much Graffiti on the Metro in Rome...  

Rotterdam:
   • Metro systeem van Rotterdam, Netherla...  

Saint Petersburg:
   • Exclusive: St Petersburg's Metro Syst...  

Samara:
   • Самарский метрополитен  

Sofia:
   • Транспорт в София, България - Local t...  

Stockholm:
   • Exclusive: The Metro System of Stockh...  

Toulouse:
   • Métro Toulouse VAL 208 SANS CONDUCTEUR  

Turin:
   • Metropolitana di Torino  

Newcastle:
   • Metro in Newcastle, UK - Tyne and Wea...  

Vienna:
   • The U-bahn/Metro of Vienna, Austria, ...  

Warsaw:
   • Poland, Warsaw, metro ride from Wierz...  
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Thank you for your support. Comment below so all of us can have a productive and insightful conversation about transportation!