Surprisingly, I didn't pre-order one although I thought I would a few months ago.
Why? An accumulation of lack of content, surprisingly high cost and the competition in the VR arena warming up nicely. To be honest the Vive and Microsoft's HoloLens interest me far more as these aren't one trick ponies (augmented VR, holographic computing).
Talking of horses, there's some cynicism that Facebook's involvement is more than just funding and could be a Trojan Horse. How Facebook will capitalise on the Rift other than getting more users signed up is anyone's guess and conspiracist's theory.