I didn't read the entire thread, but here's my first one, I think it was Asteroid at the house of a friend of my dad. Not sure if it's called asteroid, you control a little space ship and shoot at things coming at you from the top of the screen, I was really young don't remember it well. First I owned though was either Super Mario Bros./Duck hunt 2 in one cartridge on the NES, or Tetris on the game boy... probably the the NES
as for my first pokemon game, it was yellow, so the choice between squirtle and charmander never really occured