I got my first game about 11 years ago (I was 5) and it was Kirby Tilt n Tumble. It was almost like Nintendo and the game developers were planning the Wii already, because you had to tilt to move, shake the Gameboy to jump, and A and B did little more than reveal platforms and shoot you out of cannons.
I still have it, the only bad thing is that it's really hard to play on a GBA SP because of the way you put the cartridge in. The Gameboy Color itself was the easiest thing to play it on, and I think it may have actually been compatible with the original Gameboy because it has the small notch in the cartridge that all the old Gameboy games had.
Mine was Call of Duty: Modern Warfare on the XBOX. I used to have this really out of date gaming system called the GameCube and I played this game called Super Monkey Ball. I still like it.