Wii overall. It's small and sleek.
Gamecube platinum color version. The original purple color scheme I think hurt the system and made it seem more kid friendly. The platinum color scheme brought out everything good about the design.
OG Nes. It's kind of ugly now, but I think it was very sleek and futuristic for the mid-to-late 80s.
Switch looks great, but it's basically a screen. Even with the joycons attached there's not much real estate compare to the Wii U Gamepad. Every other handheld has had a much lower 'screensize to overall size' ratio.'