I strongly disagree with placing Minecraft as the #1 Rift experience. In Half-Life 2, aiming and looking are entirely discrete but in Minecrift (Rift extension for Minecraft), looking and aiming are bound together and you can't even aim upwards (mouse/hydra control is limited to horizontal movement only) to mine tree blocks directly above you without looking 90° straight up and having your headphones fall off.

It's not game-breakingly-bad, but it surely is bad enough that I wouldn't even mention Minecraft in the top 5.