I’ve gotten motion sick in VR (as well as first-person-shooters!), but I’ve also had long emersions without getting sick at all. I’m fairly susceptible, but mostly when there are quick camera moves that aren’t under my control, or with underpowered equipment (when there’s a perceivable lag in imagery to my head movements).
I still haven’t purchased any equipment. Since I’m Mac-based, it most likely means getting a Windows computer, along with whatever gear is best at the time. I still have a few non-VR projects I need to complete, so am using my will power to hold off getting VR hardware until afterwards, or I’ll never finish my old projects!