I can't speak for Kerrash obviously, but for me, FPS are nausea enducing while strafing. I don't strafe very much in real life, and when I do it in an FPS, usually at several meters per second, my brain pages my inner ear and decides that it's time to go and find some alcohol or just give up entirely, which has a profoundly unpleasant effect.
If I'm "grounded" in the VR experience, in an aircraft/spaceship/car/rollercoaster etc, there's no nausea.
Interesting! The only instance that I saw people having any problem with was the rollercoaster one back in the dk1 days, when I was demoing it back in the day. I think that one was a mistake to release with the dk1.
Yes you're certainly not alone, FPS seems to be a stickler for people. Still it worries me a bit when I see people who havent tried any FPS's immediately think it will make them ill when they think about it conceptually and that puts them off trying one. I know I did. However the most popular games on Vorpx are all FPS like fallout and gta etc so Im also not alone in not having any issues and can enjoy them (a lot) and I hope there will be built for vr fps's in development that dont go down that lame road of warping from place to place instead of normal walk/run/sneak movements. I can quickly spin 180's or strafe and jump and have no problem at all.
By the way Im also getting an omni...looks like it might be landing about the same time as the HMD's which will be quite the party! Ive no real room for it though what was I thinking? I was in a bloody kickstarter VR frenzy at the time when I ordered. Guess that coffee table isnt really needed in the livingroom...