RE: How many actually pick a spot?
Going further into what Arthur said (which I wholeheartedly agree with).....
What do you do after you pick that spot? If you put your pin there, then......you've covered up your spot. If you just put your pin there and shoot......you've accomplished the SAME THING.
Now....in saying that.....GregH said something a while back that I also agree with. When that animal's coming in......PRE-pick a spot you think you'r egonna need to stick the deer....and focus on that spot.
But when the moment of truth comes......I place my pin where i want my arrow to go.....and the "spot" IS my pin.