The title is self-explanatory. For each of the platforms you own and intend on buying new games for in 2015, list the one game that you would choose above all others.
For example:
Wii U: Legend of Zelda
3DS: Majora's Mask 3D
PS3: King's Quest
This is painful, I know, but it'll be interesting to know where the demand is the highest for each platform.