what game this gen have u played and beaten the most?

[TWRoO]

If talking about most time spent, then Mario Kart Wii definately (could be almost double the next bests of LoZ:TP and RE4:Wii

If talking about number of times going through the 1 player campaign/story etc, then RE4:Wii, which I hav completed about 10 times on various difficulties.