Wii A****** amazing.
Gamecube B: sure it wasn't that great, but it had some fun games
N64 A: very fun.
SNES (never played one)
NES (never played one)
Gameboy/poket/color: A- : very fun
GBA A- : once again fun and great games
DS A+: excellent
Xbox D: these controls sucked and they had crap games (although Crash Nitro kart was fun)
360 D- : just a stupid upgrade
PS1 D- : controls were stupid and games sucked
PS2 F :stupid
PS3 F- : horrible
I don't want any flaming at me because this is MY opinion (and it is right)