Always off. With a 30 inch draw shooting an XT my arrows are dang nye as long as the bow and where the quiver attaches they stick out. I’m just worried it will hang on a limb or shooting rail or something when I’m trying to get a shot.
I usually try to find a limb above my head or just hang it from my bow hanger.
I’ve never spot and stalked so I can see where it is an advantage there getting used to shooting with it on though.