I moved this to its own thread instead of the 'about off topic' thread -- you can change the title if you want
I always played with vsync off on PC, though I've noticed some games on Mac have a crazy amount of tearing when vsync is off.. like it's a constant tear that just dances across your screen the whole time. Some people might get nausea from screen tearing and other artifacts. Some may just prefer it over more responsive controls.
I really want to try out a gsync monitor -- basically interfaces directly with your GPU to synchronize the refresh rate and eliminate the possibility of screen tearing without having to wait on vsync. Hopefully that tech becomes mainstream and the whole issue is done away with