Chart me down with the Super Mario Bro/Duck Hunt lot.
Super Mario Bros.
First one I actually owned? Tetris, that came with like every GameBoy... ever... back then. Then I became a Sega person right up until I got my Uncle's SNES when he upgraded to a PSX. Then I got Super Metroid and was hooked.
While remembering Game & Watch, I have discovered my first Nintendo Nintendo game was either Snoopy Tennis or Donkey Kong Jr.
Bow before the mighty Javoo!