Best Handheld Game System

[Veknoid_Outcast]

Based on what I own:

DS
GBA
3DS
PSP
GB/GBC
Vita
Game Gear

I think DS wins by a mile. It's an amazing, truly innovative system with a huge, diverse library of games. I imagine 3DS could claim the top spot at some point if Nintendo and third parties maintain support over the next few years.