I had this game with the NES (along with Duck Hunt). Technically, it was the family console as my Dad got it for us all to use (i primarily used it). Had many, many great hours playing 2 player (i was always Luigi), couldn't do better than my Dad when we took it in turns, even though i could see the level as he was playing. Even when i had a Mega Drive, i was still hooked on Super Mario Brothers. It took me until just before i got an N64 to finally defeat Bowser, must have been 8 years or so of playing on/off to do so. Learned many of the warp pipes.
Duck Hunt got a lot of play time, but i hold a place in my gaming heart for Super Mario Brothers. Never played Super Mario Brothers 2 or 3 on the NES, didn't play either until the Wii VC.