Depends what you are into but I love Space Pirate Trainer as an "intro" as it really is superbly done and takes advantage of lots of the unique VR capabilities

Depends what you are into but I love Space Pirate Trainer as an "intro" as it really is superbly done and takes advantage of lots of the unique VR capabilities (think, space invaders where you can physically duck or sway out of the way of bullets) - but it is still completely intuitive to someone new.