I get most my consoles for just one game, kind of. I know that more stuff will come out that I'll like and don't really regret getting the systems.

Sega Saturn: NiGHTS into Dreams
Gamecube: Super Smash Bros Melee
Wii: Super Smash Bros Brawl
PS3: Metal Gear Solid 4
XBOX 360: Lost Odyssey (this is the only system I regret. This is the only game I played on it aside from Tales of Vesperia).
Wii U: Super Mario 3D World
Gameboy Advance: Kingdom Hearts Chain of Memories
PSP: Kingdom Hearts Birth By Sleep
DS: 358/2 Days
3DS: Dream Drop Distance
Vita: Gravity Rush