My first game was Mega Man X on SNES, but I also had the Legend of Zelda: Link to the Past, Super Mario All Stars and Donkey Kong Country.
But if it wasn't Mega Man X and its awesome platformer action gameplay, I probably wouldn't be as big gamer as I am today.
So yeah, platforming in particular got me in to gaming, but now I'm open for all genres expect horror survival (weak minded person I am). My favorite genres being action, platformer, RPG, strategy/tactic and stealth action.