I think the Game Boy Color is my favourite. It just fit it’s purpose so well. Simple, rugged, compact, reasonably priced and looked great. The cartridge system was perfect for kids.

The original Game Boy just missed the sweet spot and the DS is when they start getting more fragile, more expensive and the game cards were a lot less kid friendly than the cartridges were. They were all good in their own right still but didn’t quite hit the mark as well. The non-SP advance was pretty close though.