Periodically a chart makes the rounds on the Internet asking you to fill it out for your "Variety Gamer Score". This chart annoyed me with its focus on big name properties and also a very odd skew towards JRPGs, so I made my own, which I think is a much better measurement of how diverse your video game habits are.
Each entry is an external hyperlink to a site with more information about the series. Sometimes this is a corporate marketing page, sometimes this is a Wikipedia link, sometimes it is a direct link to purchase the game, or even play it for free where applicable. For inclusion on this list, I required that the title in question actually belong to a series of at least two games; however, not all of them are still readily available.