Currently Online 
Atari 2600 alive and well
NES - alive and well (although I haven't tested R.O.B. in a long time)
Sega Master system - alive and well
SNES - Alive and well (my controllers aren't in good shape as the cords kept getting pulled out of them)
N64 - Alive and well (none of my original controllers are in good shape the analog sticks have a ton of play in them)
PS1 - ran through several of these but Wal-Mart hadn't wised up on their return policy back then and I exchanged them all
PS2 - slim - barely plays but if you give it enough time it will
Game Cube - alive and well
PS3 - bought it late in the gen used but I have the middle body style and it works fine
360 - alive and well - bought it late in the gen the 4 GB model
Wii - alive and well
Wii U - getting played almost every day
EDIT: forgot the hand helds original gameboy still worked last I threw batteries in it. My son (aka The Boy) was trashed several Dual Screens from the DSI to the 3DS but he drops them constantly and always keeps them in his front pocket and the L/R buttons break.
