I'm getting a XBOX One, what should i play?

[Xtortion]

Ninja Gaiden Black

 

[EvilBoris]

Crackdown
Dead Rising
Burnout Revenge
Hitman Blood Money
Left 4 Dead
Metro 2033

These are a few that were 360 exclusive, several made their way to PC or have been remade, but it's possible they passed you by.