I guess that is why they say take the first good shoot your are given.......... Don't wait for the perfect shot, it won't come............
This is what kills me about some of the hunting videos. They wait for friggin' EVER to take a shot. I realize that a video full of 10 second hunts wouldn't be very entertaining, but usually I'm screaming SHOOT, SHOOT! WHAT ARE YOU WAITING FOR, WRITTEN PERMISSION?! Don't get me wrong. I love watching the videos.
For me, I always take the first good shot that I'm prepared for. Second chances are rare. Make good when the gettin' is good.