PSX: Grey (The original PSX, the square shape...and still works)
PS2: Slimline Black my 1st generation one died, got this one next
PS3: Piano Black
PSP: Piano Black
NES: Grey and Black (still works a charm!)
Gameboy Colour: Purple
Used to have a dark grey N64 too.
That's it really...used to have a Commodore 64, but that's not a console. Also once upon a time years ago had an Atari with the faux wood on it
Of colours, I like black. All technology should be black and brushed steel. Any lights should also be red. Anything else just looks tacky.