SNES: This was first console I ever had. My earliest memory of it was me playing Super Mario World on a 9" Sanyo tube TV, and that was back when the Sega Dreamcast was still being supported.
GBA SP: I know this one is a handheld, but I had a lot of fond memories of it. Whether it'd be playing multiplayer Mario Kart Super Circuit in the car, or just getting a new game for it.
NES: This one was a hand-me-down console. I had the side-loader model, along with a bunch of different games, two controllers, and a grey Zapper.
Gamecube: My brother and I got a Gamecube for Christmas, along with a two controllers, one black and the other silver, a copy of Mario Party 7, and a copy of Mario Kart Double Dash. I'd say this was the biggest system of my childhood.