As regards actual use of Rift and VR generally, I will relate a bit of my experience:
Controllers - Special controllers were not a big deal for me. I do have some which work well with my Rift, the Sixense/Razer “Hydra”. They cost me about $50 at the time and are quite nice. They are accurate and responsive, but one needs to make profiles for them in whatever their game of choice is. And I also did a lot of play with my usual mouse and keyboard combination.
Motion sickness - As counterintuitive as this may seem, I think that VR motion sickness is an advantage rather than an obstacle. I was mostly playing in fast, low-gravity combat arenas with lots of movement, including vertically. The reason why the movements induced motion sickness was because those same movements would in meatspace. This is the kind of thing immersive VR excels at! Treating it like a stationary 3D gimmick misses the point. The VR facilitates MORE movement because one can move, look, and shoot all in different directions at the same time, while flying through the air. It is one of the most badass things ever. But it is not a “plug-n-play” experience in that respect, one needs to develop “sea legs”, and like any worthwhile video game skill, that takes time.
