I have an Oculus Rift and had a DK2, and to be honest I was skeptical of gaming in VR at the current iteration of the technology as it gets tiring in the long run and a lot of the games are more tech demos than real games.
But then I played Elite:Dangerous (space sim) and later The Unspoken (fireball-tossing wizard duels in multiplayer). These are games where that sense of presence that VR offers is used to mind-blowing effect. Especially in E:D, as VR allows a real sense of *scale*. I never thought about this before I tried E:D, but flying into a space station that is over a km long really gives you a "holy crap that this is huge"-feeling. And you really feel that you are sitting *inside* of your ship, which is oddly pleasing.
The same for The Unspoken. Using Oculus touch controllers you really feel that the hands you see in-game are your own, and the first time I saw my right hand burst into flame as I was charging up a fireball was another of those "holy crap" moments.