~Zero on 15 February 2015
I'll go with GameCube. While GBA had a wider library of games, the GC is the home of many masterpieces, such as Metroid Prime and Wind Waker.
Honestly, there wasn't any game I've played on my GBA that made me say "Wow". There were some really good games there, but nothing that stood out.
My current Wii U game list:
My current 3DS game list:
