Didn't own all of these, but I had access to them for a large amount of time (living with Family...)
2600 (Parents owned)
SNES
GBA
XBox (My brother's)
GC
DS
PS2
Wii
Don't really have a favorite, all have had good games. Out of all of them I probably played the PS2 and GBA the least and the Xbox and GC the most.