>VR Sickness
https://www.tandfonline.com/doi/abs/10.1207/s15326969eco0303_2
this is the most important thing of all. 
posterior instability: what this means is that you're physically uncoordinated and use your eyes primarily to balance yourself.
People who can balance on one foot with their eyes closed or learn to do it will get over vr sickness extremely fast.
You're adaptive.
if you skateboard, ride a bike, ski, or do anything of actual value instead of sitting on your ass playing 2d vidja, you will NOT get simsickness or you will get over it fast.