Not in any particular order
Currently own:
PlayStation
PlayStation 2
PlayStation 2 Slim
PlayStation 3
PlayStation Vita
Xbox One
Nintendo 3DS
Nintendo 64
Nintendo Gameboy Color (sic)
PC - well, a laptop at least
Previously Owned
Spectrum 48k
Nintendo Entertainment System
Super Nintendo Entertainment System
Nintendo Gameboy
Nintendo Gameboy Color (sic)
Nintendo Wii
Xbox
Xbox 360
Sega Dreamcast
Sega Saturn
PlayStation Portable Slim