Hmm, that's hard and it's going to change for sure considering Vertigo 2 is releasing soon, and Foglands, Vampire, Journey to Foundation, RE4make, etc.
1. Organ Quarter (dream come true for me and I didn't even realize I wanted to experience a game like this)
2. Hubris (love the variety and just had a damn fun time with it)
3. Propagation: Paradise Hotel (easily the most terrifying VR experience I've had. Village would have taken it if I first played it first in VR rather than flat a few times)
4. Red Matter 2 (this is my favorite for interacting with objects, the physics are great and I love boosting around the environment with the jet pack)
5. Moss 1 & 2 (charming as F, I really wish we had more third person action/platformer games)
Honorable mentions, Hellsweeper VR, The Light Brigade, Synapse, RuinsMagus, The Tale of Onogoro, Walking Dead Saints and Sinners.
Honestly not even satisfied with that list. All I know for certain is that Organ Quarter is my personal favorite.