The original and best? Definitely! I still own a Nintendo NES along with a string of games and I never tire of playing Mario. Super Mario Brothers was the first platform game that really seemed to capture the heart of the nation, coming bundled with the NES system.
I distinctly remember my first Christmas with Mario, sat glued to the screen and thinking how cool it was that he went into a castle at the end of each level and put up a flag! Let's face it - Mario is just as popular today as he was in 1985, and without the impeccable gameplay of Super Mario Brothers this would not have happened.