Link - Fighting for the princess since 1986.From the series The Legend of Zelda, Link has fought through level after level and game after game in search of his princess. I counted 25 games that feature Link on the Zelda Wiki site.
My fascination with Link grew out of my gaming experience with Ultima. Zelda was the first adventure game where it was about live action and was also one of the first adventure games where the graphics were somewhat evolved (for the time).
Photo courtesy of GameSpot, a CBS Interactive site.