PS2, PS3, Wii, Super Nintendo, Nintendo DS, Nintendo DSi AND Nintendo 3DS (I would trade in the DSi if it was in better condition, but the bottom screen is broken), N64 (well, BF and I share that one), and a Gameboy Advanced SP. BF has another Super Nintendo, another SP, an Xbox 360, another PS3, another Wii and a PS2 (Actually his is over at my house, while mine is collecting dust at my sister's...same with my PS3, I better ask for it back soon!), Our computers are stuffed to the gills with games too xD
And if sold systems count, I've had a Sega Genesis, game boy colour, gameboy advanced, and a Playstation 1 before, but sold them in garage sales due to mom pressures XD Both my BF and I have a broken gamecube, mine for reasonable reasons (it just got old, after surviving 2 floods and 3 moves, wish I could find it though to see if I can get it working again now that I have the techy BF), his for residing in his brother's room XD