For me it would have to still be the NES considering it saved the video game industry and had tons of games on it that I loved.
N64 - 9 votes
PS3 - 6 votes
360 - 5 votes
SNES - 4 votes
Wii - 3 votes
PS2 - 3 votes
NES - 2 votes
PS1 - 2 votes
Genesis/Megadrive - 2 votes
DS - 1 vote
Gamecube - 1 vote