Some consoles/handhelds are successful even if the general public doesn't consider them so. For example, the SEGA Game Gear was successful with a long run in the 1990's, but due to the Game Boy line being more popular, most gamers consider the Game Gear unsuccessful. In my opinion, this isn't fair. So I dedicate this thread to all those consoles who were commercial successes even if they weren't the most popular console at their times.
What are your favorite successful consoles that are usually labeled as "unsuccessful?"